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The Calculation of One-variable Linear Equation in Junior One Mathematics
( 1) 66x+ 17y=3967

25x+y= 1200

Answer: x=48 y=47.

(2) 18x+23y=2303

74x-y= 1998

Answer: x=27 y=79

(3) 44x+90y=7796

44x+y=3476

Answer: x=79 y=48

⑷76x-66y = 4082

30x-y=2940

Answer: x=98 y=5 1.

(5) 67x+54y=8546

7 1x-y=5680

Answer: x=80 y=59

(6) 42x-95y=- 14 10

2 1x-y= 1575

Answer: x=75 y=48

(7) 47x-40y=853

34x-y=2006

Answer: x=59 y=48

(8) 19x-32y=- 1786

75x+y=4950

Answer: x=66 y=95

(9) 97x+24y=7202

58x-y=2900

Answer: x=50 y=98

( 10) 42x+85y=6362

63x-y= 1638

Answer: x=26 y=62

( 1 1)85x-92y =-25 18

27x-y=486

Answer: x= 18 y=44.

( 12) 79x+40y=24 19

56x-y= 1 176

Answer: x=2 1 y= 19.

( 13) 80x-87y=2 156

22x-y=880

Answer: x=40 y= 12.

( 14) 32x+62y=5 134

57x+y=2850

Answer: x=50 y=57

( 15) 83x-49y=82

59x+y=2 183

Answer: x=37 y=6 1.

( 16) 9 1x+70y=5845

95x-y=4275

Answer: x=45 y=25.

( 17) 29x+44y=528 1

88x-y=3608

Answer: x=4 1 y=93.

( 18) 25x-95y=-4355

40x-y=2000

Answer: x=50 y=59

( 19) 54x+68y=3284

78x+y= 1404

Answer: x= 18 y=34.

(20) 70x+ 13y=3520

52x+y=2 132

Answer: x=4 1 y=50.

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

24x+y= 1080

Answer: x=45 y=99

(22) 36x+77y=76 19

47x-y=799

Answer: x= 17 y=9 1.

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

3 1x-y= 1333

Answer: x=43 y=78

(24) 28x+28y=3332

52x-y=4628

Answer: x=89 y=30

(25) 62x-98y=-2564

46x-y=2024

Answer: x=44 y=54.

(26) 79x-76y=-4388

26x-y=832

Answer: x=32 y=9 1.

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

42x-y=546

Answer: x= 13 y=4 1.

(28) 69x-96y=- 1209

42x+y=3822

Answer: x=9 1 y=78.

(29) 85x+67y=7338

1 1x+y=308

Answer: x=28 y=74

(30) 78x+74y= 12928

14x+y= 12 18

Answer: x=87 y=83.

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

59x-y=584 1

Answer: x=99 y=35

(32)29x+ 18y = 19 16

58x+y=2320

Answer: x=40 y=42

(33) 40x+3 1y=6043

45x-y=3555

Answer: x=79 y=93

(34) 47x+50y=8598

45x+y=3780

Answer: x=84 y=93

(35) 45x-30y=- 1455

29x-y=725

Answer: x=25 y=86

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

47x+y=799

Answer: x= 17 y=36.

(37) 33x+59y=3254

94x+y= 1034

Answer: x= 1 1 y=49.

(38) 89x-74y=-2735

68x+y= 1020

Answer: x= 15 y=55.

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

78x+y=3822

Answer: x=49 y=4 1.

(40) 28x-62y=-4934

46x+y=552

Answer: x= 12 y=85.

(4 1) 75x+43y=8472

17x-y= 1394

Answer: x=82 y=54.

4 1x-38y =- 1 180

29x+y= 1450

Answer: x=50 y=85

(43) 22x-59y=824

63x+y=4725

Answer: x=75 y= 14.

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

90x+y= 1530

Answer: x= 17 y=36.

(45) 93x-52y=-852

29x+y=464

Answer: x= 16 y=45.

(46) 93x+ 12y=8823

54x+y=49 14

Answer: x=9 1 y=30.

(47) 2 1x-63y=84

20x+y= 1880

Answer: x=94 y=30

(48) 48x+93y=9756

38x-y=950

Answer: x=25 y=92

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

75x-y=5475

Answer: x=73 y=48

(50) 83x+64y=929 1

90x-y=3690

Answer: x=4 1 y=92.

One yuan at a time:

1) 12(2-3X)=4X+4

24-36X=4X+4

-40X=-20

X= 1/2

(2)6-3(X+2/3)=2/3

6-3X-2=2/3

-3X=- 10/3

X= 10/9

(3)2(200- 15X)=70+25X

400-30 times = 70+25 times

-55 times =-330

X=6

(4)3(2X+ 1)= 12

6X+3= 12

6X=9

X=3/2

(5) 1/4X- 1/2=3/4

( 1/4)X=5/4

X=5

(6)7X-5/4 =3/8

7X= 13/8

X= 13/56

(7)2X- 1/6 = 5X+ 1/8

-3X=7/24

X=-7/72

(8)( 1/2)X-7 = 9X-2/6

-( 17/2)X=20/3

X=-20/5 1

(9)( 1/5)X- 1/2(3-2X)= 1

( 1/5)X-3/2+X= 1

(6/5)X=5/2

X=25/ 12

( 10)2X+( 1/3)-5X-( 1/6)= 1

-3X+( 1/6)= 1

-3X=5/6

X=-5/ 18

( 1 1) 1/7(2X+ 14)= 4-2X

(2/7)X+2=4-2X

( 16/7)X=2

X=7/8

( 12)3/ 10(200+X)-2/ 10(300-X)= 300 * 9/25

60+(3/ 10)X-60+( 1/5)X = 108

( 1/2)X= 108

X=2 16

Three yuan once:

( 1)3x-y+z=3

2x+y-3z= 1 1

5x+4z= 14

3x-y+z=3

x+y+z= 12

4x+2z= 15

8x+4z=30

3x= 16,x= 16/3,z =( 15-64/3)/2 =- 19/6

y = 12- 16/3+ 19/6 =(72-32+ 19)/6 = 59/6

(2)8x+2y-2z=24

3x+2y+z=5

5x-3z= 19

3x+2y+z=5

2x-2y+ 10z=2

5x+ 1 1z=7

5x-3z= 19

14z=- 12,z=-6/7,5x = 19+ 18/7 = 15 1/7,x= 15 1/35

y = x+5z- 1 = 15 1/35- 150/35- 1 =-34/35

(3)

z=3x- 1,y=3z-4=9x-3-4=9x-7

2x+63x-49=3,65x=46

(4)

x+y=3 2x-y+2z=2 x-y-z=3

y=3-x,x-3+x-z=3,z=2x-6

2x-3+x+4x- 12=2,7x= 15+2= 17,

(5)

x-2y-3z =- 18 x+3y-2z-8 = 0 x+y+2z-24 = 0

x+y+2z=24

3y+5z=42

x+3y-2z=8

x+y+2z=24

-2y+4z= 16

6y+ 10z=84

-6y+ 12z=48

22z= 132,,z=6,,3y=42-30,y=4

x=24-4- 12=8

Never mind, I copied it!