74x-y=6956

28x+y= 1064

Answer: x=83 y=75

Answer: x=48 y=47.

=( 1/2+ 1/3+....+ 1/2005)( 1+ 1/2+ 1/3+....+ 1/2004)-( 1/2+ 1/3+...+ 1/2005)( / kloc-0//2+ 1/ 3+...+ 1/2004)-( 1/2+ 1/3+...+ 1/2004)

Answer: x=69 y=62

44x+y=3476

Answer: x=45 y=99

It took A three years, B two years,

Answer: x=44 y=54.

38x-y=950

Answer: x=94 y=30

90x+y= 1530

30x-y=2940

Answer: x=49 y=4 1

52x-y=4628

Answer: x=37 y=6 1

Answer: x=83 y=40

Answer: x=60 y=30.

(59)5 1x-6 1y =- 1907

29x+y= 1450

(57) 46x+37y=7085

= 1/ 19( 1+ 1/ 1 1+ 1/ 13+ 1/ 17)- 1/ 19( 1/ 1 1+ 1/ 13+ 1/ 17)

(34) 47x+50y=8598

Answer: x=94 y= 16.

⑺ 47x-40y=853

1 1x+y=308

(3 1) 39x+42y=533 1

29x+y=464

⑾ 85x-92y=-25 18

(56) 20x-45y=-3520

Answer: x=40 y= 12

(63) 29x+2 1y=3

Answer: x=60 y=94

Xiao Ming said: Oh, then I understand.

68x+y= 1020

27x-y=486

76x+y= 1976

7 1x-y=5 183

3 1x-y= 1333

55x-y=4565

58x+y=2320

19x-y= 1520

Answer: x=73 y=43

(36) 1 1x-43y =- 136 1

(76) 79x-45y=5 10

Answer: x=83 y=20

September1September 5

14x-y=924

3. Arabian Nights is like a book contract: there are a flock of pigeons, one of whom is singing in the trees, and the other is looking for food on the ground. A pigeon in the tree said to the pigeon looking for food on the ground, "which one of you flies up, the pigeons under the tree are all kinds of pigeons." If one flies down from the tree, there are as many pigeons in the tree as there are under it. " You know that tree.

14x+y=966

5x= 10000, 4x=8000 Suppose that X people will be arranged to process Part A and Y people will process Part B, so that a complete set of parts can be produced every day.

The numerator of this fraction is 3, and the denominator is 5, which is 3/5.

20x+y= 1880

96x-y=8640

(44) 95x-56y=-40 1

(87) 43x-52y=- 1742

Answer: x=2 1 y=47.

Take the minus sign behind this formula apart first:

Answer: x=70 y=62

⑽ 42x+85y=6362

Answer: x=28 y=74

(97) 27x-24y=-450

63x+y=4725

(40) 28x-62y=-4934

n/(n+2+ 1)= 1/2

4x-2y=4000，

59x-y=584 1

Answer: x=23 y=46

52x+y=2 132

Answer: x=27 y=79

June 4, June 7

Answer: x=50 y=59

75x-y=7350

94x+y=8554

(66) 43x+50y=7064

⒀ 80x-87y=2 156

A gains 5 times, B gains 4 times,

(80) 6 1x+90y=500 1

84x-y=78 12

Answer: x=59 y=48

(39) 94x+7 1y=75 17

⑵ 18x+23y=2303

75x-y=5475

(79)6 1x+94y = 1 1800

(86) 66x-7 1y=- 1673

(49) 99x-67y=40 1 1

(90) 12x- 19y=236

95x-y=7885

93x+y=5952

14x+y= 12 18

(95) 30x- 17y=239

(96)55x- 12y = 4 1 12

Answer: x=89 y=70

Answer: x=4 1 y=50.

Like the solution of the previous question, first disassemble the formula behind the minus sign:

Answer: x=79 y=93

Xiao Ming and both are students of Teacher Zhang. Teacher Zhang's birthday is M month N day. Both of them know that Teacher Zhang's birthday is one of the 10 groups listed below. Teacher Zhang tells Xiaoming the value of m and Xiao Qiang the value of n. Teacher Zhang asked them if they knew Xiaoming's birthday.

y-3

56x-y= 1 176

99x-y=782 1

(28) 69x-96y=- 1209

=( 1/2+ 1/3+....+ 1/2004+ 1/2005)-( 1/2+ 1/3+...+ 1/2004)

Answer: x=4 1 y=29.

33x-y= 1452

Answer: x=58 y=84.

Answer: x=44 y=68

Answer: x= 13 y=84.

( 1+ 1/ 1 1+ 1/ 13+ 1/ 17)( 1/ 1 1+ 1/ 13+ 1/ / kloc-0/7+ 1/ 19) -( 1+ 1/ 1 1+ 1/ 13+ 1/ 17+ 1/ 19)( 1/ / kloc-0/ 1+ 1/ 13+ 1/ 17)

(77) 29x-35y=-2 18

=( 1+ 1/ 1 1+ 1/ 13+ 1/ 17)( 1/ 1 1+ 1/ 13+ 1/ / kloc-0/7+ 1/ 19) -( 1+ 1/ 1 1+ 1/ 13+ 1/ 17)( 1/ 1 1+ / kloc-0// 13+ 1/ 17)- 1/ 19( 1/ 1 1+ 1/ 13+ 1/ 17)

(9 1)5 1x+99y = 803 1

40x-y=2000

45x+y=3780

89x+y=23 14

(93) 46x+34y=4820

(27) 63x-40y=-82 1

⑻ 19x-32y=- 1786

14x-y=840

Answer: x=73 y=9 1

One train leaves Los Angeles for new york at a speed of 15km per hour, and the other train leaves new york for Los Angeles at a speed of 20km per hour. If there is a bird, at the speed of 30 kilometers per hour, two trains start at the same time, set sail from Los Angeles, meet another train and return, and sail back and forth on the two trains in turn until the two trains meet, how long does the bird sail?

Answer: x=26 y=62

95x-y=4275

57x+y=2850

(30) 78x+74y= 12928

x=46，y= 16

89x-y=23 14

(50) 83x+64y=929 1

Quadratic calculation of three

(5 1) 17x+62y = 32 16

Answer: x= 17 y=9 1.

4 1x-38y =- 1 180

Answer: x=78 y=77.

( 1/2+ 1/3+....+ 1/2005)( 1+ 1/2+ 1/3+....+ 1/2004)-( 1+ 1/2+...+ 1/2005)( 1/2+ 1/3+...+ 1/2004)

The scale of the problem is mainly: power operation and binary linear equations.

According to the meaning of the question, x+y=62.

65438+February165438+February 2nd 65438+February 8th

6 1x-y=4636

Answer: x=9 1 y= 14.

(82) 19x-96y=-59 10

Answer: x=88 y=85.

5. As shown in the figure, fill in some algebraic expressions and numbers in the 3×3 grid. If the sum of the three numbers on the row and column is equal, please find the values of x and y.

Answer: x=40 y=42

(92) 37x+74y=4403

The more the better, the best plan, if not, pull.

Answer: x=69 y=29.

Answer: x=98 y=25.

⑹ 42x-95y=- 14 10

Answer: x=38 y=53

Xiao Ming said: If I don't understand, neither does Xiao Qiang.

Answer: x=82 y=54.

(73) 65x-79y=-58 15

( 17) 29x+44y=528 1

40x+y=2920

47x+y=799

89x+y=55 18

1. 1 fraction, the denominator is 2 larger than the numerator, and the denominator plus 1 equals half. Find the original fraction!

care for

(22) 36x+77y=76 19

24x+y= 1080

Answer: x=73 y=48

n/(n+3)= 1/2

(23) 13x-42y=-27 17

83x-y=5727

Answer: x=9 1 y=78.

⒂ 83x-49y=82

2n=n+3

2 1x+y= 1386

Answer: x=50 y=85

42x+y=3822

(75) 60x-44y=-352

(52) 77x+67y=2739

Answer: x=97 y=59.

Answer: x=43 y=78

://.csok./sort/333_ 1.htm

(83) 80x+74y=8088

85x+y=8330

Answer: x=75 y= 14.

( 100) 5 1x-97y=297

(78) 33x-24y= 1905

⒁ 32x+62y=5 134

(8 1) 93x- 19y=2

n=3

I want to find some difficult seven-level arithmetic problems.

A: Let the numerator be n and the denominator be (n+2). The equation is as follows:

7 1x-y=29 1 1

Answer: x=2 1 y= 19.

56x-y=2296

2 1x-y= 1575

Answer: x=62 y=76

(88) 70x+35y=8295

58x-y=2900

Answer: x=79 y=97

(2 1) 48x-54y=-3 186

(70) 15x+26y= 1729

Answer: x=64 y=84.

March 4, March 5, March 8

26x-y=832

Answer: x=78 y=24.

(24) 28x+28y=3332

12x/3=23y/2

Answer: x=89 y=30

42x-y=546

4. The binary linear equation (1) x+y = 4, (2) 2x-y = 2, and (3) x-2y = 1 is known. Please choose two of the three equations that you like to form 1 equation, and find the solution of this equation.

Answer: x=32 y=9 1

Answer: x=92 y=79

52x-y= 17 16

90x-y=3690

Answer: x=58 y= 12.

Answer: x= 17 y=36.

= 1/ 19

7 1x+y=5609

(37) 33x+59y=3254

(85)93x+ 12y = 9 1 17

Answer: x=93 y=27

(43) 22x-59y=824

5x-3y=4000，

Answer: x=76 y=97.

Answer: x=89 y=43

Xiao Qiang said: I didn't understand at first, but now I understand.

34x-y=2006

(89) 43x+82y=4757

Answer: x=75 y=48

(68) 92x+83y= 1 1586

= 1/ 19( 1+ 1/ 1 1+ 1/ 13+ 1/ 17- 1/ 1 1- 1/ 13- 1/ 17)

Answer: x=25 y=92

67x-y=3886

Answer: x=80 y=59

(20) 70x+ 13y=3520

Answer: x=26 y=55

⑶ 44x+90y=7796

Answer: x=33 y=34

(6 1) 15x-4 1y = 754

7 1x-y=5680

22x-y=880

Solving this system of equations gives x=46, y= 16.

(26) 79x-76y=-4388

(45) 93x-52y=-852

Answer: x= 13 y=4 1.

79x-y=7268

(4 1) 75x+43y=8472

Answer: x=98 y=57.

Answer: x=84 y=93

(32)29x+ 18y = 19 16

56x+y=728

(38) 89x-74y=-2735

(55) 22x-38y=804

29x-y=725

Answer: x=50 y=57

Answer: x=80 y=38

3 1x-y=7 13

Answer: x=66 y=87

45x+y=26 10

54x+y=49 14

Answer: x=87 y=83.

Answer: x=79 y=45

⑼ 97x+24y=7202

Answer: x=66 y=95

Answer: x= 15 y=55.

14x-y=364

(58) 17x+6 1y=4088

=( 1+ 1/ 1 1+ 1/ 13+ 1/ 17)( 1/ 1 1+ 1/ 13+ 1/ / kloc-0/7+ 1/ 19- 1/ 1 1- 1/ 13- 1/ 17)- 1/ 19( 1/ 1 1+ 1/ 13+ 1/ 17)

(53) 20x-68y=-4596

(35) 45x-30y=- 1455

Answer: x=5 1 y=2 1.

⑷ 76x-66y=4082

(29) 85x+67y=7338

(74) 96x+54y=62 16

(54) 23x+87y=4 1 10

59x+y=2 183

(25) 62x-98y=-2564

63x-y=8

45x-y=3555

( 1+ 1/ 1 1+ 1/ 13+ 1/ 17)( 1/ 1 1+ 1/ 13+ 1/ / kloc-0/7+ 1/ 19) -( 1+ 1/ 1 1+ 1/ 13+ 1/ 17+ 1/ 19)( 1/ / kloc-0/ 1+ 1/ 13+ 1/ 17)

Answer: x=26 y=95

Answer: x= 18 y=88.

Answer: x=4 1 y=93.

Answer: x=66 y=7 1

Does the second calculation of 3 count?

1 1x+y=23 1

63x-y= 1953

38x-y=2280

Answer: x= 12 y=85.

(98) 97x+23y=8 1 19

28x-y=2492

74x-y= 1998

17x-y= 1394

(7 1) 64x+32y=3552

Answer: x=25 y=86

1 The manager has three women, and the sum of the spring and autumn of the three women is 13. The spring and autumn of three women is equal to the spring and autumn of the manager. There are 1 subordinates who have learned the spring and autumn of the manager, but they still can't determine the spring and autumn of three women. At this time, the manager said that only 1 women have black hair, and then this. How much is the separation of three girls in the spring and autumn? For what?

(94) 47x+98y=586 1

=( 1/2+ 1/3+....+ 1/2005)( 1+ 1/2+ 1/3+....+ 1/2004 - 1/2- 1/3-...- 1/2004)-( 1/2+ 1/3+...+ 1/2004)

59x-y=4897

= 1/2005

Answer: x=9 1 y=30.

Please guess teacher Zhang's birthday according to the dialogue above.

(84) 53x-94y= 1946

⑴ 66x+ 17y=3967

43x+y=30 10

Answer: x=23 y=46

94x+y= 1034

(48) 48x+93y=9756

2x32

Answer: x=98 y=5 1

( 19) 54x+68y=3284

69x-y=6003

Answer: x=4 1 y=60.

Answer: x= 18 y=44.

⑿ 79x+40y=24 19

(72) 94x+66y= 10524

Answer: x=79 y=48

Answer: x= 18 y=34.

⑸ 67x+54y=8546

Answer: x= 17 y=36.

(33) 40x+3 1y=6043

30x+y=2670

Answer: x= 16 y=45.

(62) 78x-55y=656

78x+y= 1404

70x+y=6790

2 controversy

( 1/2+ 1/3+....+ 1/2005)( 1+ 1/2+ 1/3+....+ 1/2004)-( 1+ 1/2+...+ 1/2005)( 1/2+ 1/3+...+ 1/2004)

75x+y=4950

Answer: x=90 y= 12.

35x+y=3080

(47) 2 1x-63y=84

30x-y=2340

Answer: x=99 y=35

46x+y=552

Answer: x=87 y= 16.

88x-y=3608

86x-y= 1548

Answer: x=4 1 y=92.

The monthly salary is 50 thousand, and the latest oral test of Microsoft Shenzhou Research Institute.

88x-y=2024

48x+y=2448

(65) 28x-63y=-2254

Answer: x=26 y= 1 1.

( 18) 25x-95y=-4355

Answer: x=26 y=53

Answer: x= 1 1 y=49.

x=2000，

86x+y=6708

( 16) 9 1x+70y=5845

(46) 93x+ 12y=8823

25x+y= 1200

(69) 99x+82y=6055

47x-y=799

(99) 84x+53y= 1 1275

4y

Answer: x=50 y=98

Answer: x=45 y=25.

(64) 58x-28y=2724

(67) 58x-77y= 1 170

Answer: x=3 1 y=60.

78x+y=3822

69x-98y=-2404

2. A flock of geese comes to a flock of dogs, one goose head, one dog head and a half hundred and fifty, and one and a half legs. How many geese come and how many dogs?