One-dimensional linear equation exercise in first grade mathematics is difficult to solve (there is a solution! )

There are 85 technicians in a workshop. On average, each person can process 16 pieces of A or 10 pieces of B every day, and two pieces of A and three pieces of B are matched with one set. How many people are arranged to process parts A and B respectively to make the parts A and B processed every day just match?

( 1)2(x+8)=3(x- 1)

(2)8x=-2(x+4)

(3)2x- two thirds (x+3)=-x+3

(4)2( 10-0.5y)=-( 1.5y+2)

1. The scoring rules for football matches are: win a game, get 3 points; draw a game, get 1 point; lose a game, get 0 point. If a team plays 14 games,

Get 17 points, including five defeats, then the team won () games.

a3 b . 4 c . 5d . 6

The one-meter-long team advances at a speed of 60 meters per minute. A classmate at the end of the line, 1 minute walks from the end of the line to the head of the line. The distance this classmate walks is () meters.

A.a B. a+60 C.60a D.60

There are two candles with the same length, one can light for 4 hours and the other can light for 3 hours. When there is a power failure, two candles are lit at the same time. After the call, it was blown at the same time, and it was found that one of them was half of the other, and the power outage time was () hours.

A.2 B.2.4 C.3 D. 2.5

4. A school teacher went out for four days during the holiday. It is known that the sum of the dates of these four days is 42, so the date of the last day of these four days is _ _ _ _ _ _ _ _.

5. If the ten digits on a two-digit number are half of the single digits, and the sum of the digits on the two-digit number is 9, then the two-digit number is _ _ _ _ _ _ _ _.

The answer is below.

The answer is below. -

The answer is below.

Set x people to process armor.

16x÷2=(85-x)* 10÷3

Solution: x=25

85-25=60,

There are 25 people in A and 60 people in B..

1. If this team wins x games, it will draw with (8 ﹣/kloc-0 ﹣ x). According to the meaning of the question, we can get 3x+(8 ~1~ x) =17, and the solution is X = 5.

2. One minute later, the team leader advanced 60* 1=60m.

So the students' forward distance = captain +60=a+60.

3. Set the power outage for x hours.

1-x/4=2( 1-x/3)

Solution: x=2.4

Solution: suppose they start with X.

x+(x+ 1)+(x+2)+(x+3) = 42

Solution: x = 9

5. Let the tenth digit be X and the fourth digit be 2x.

So there is x+2x=9 and the solution is x=3, so 2x=6.

So this two-digit number is 36.

2x+ 16=3x-3