5x- 1000=x
x=250
So Uncle Wang lost 250 yuan.
Solution: the powder area of each room is x square meters, and the equation can be listed.
(8x-50)/3-( 10x+40)/5 = 10
x=52
(8x-50)/3= 122
( 10x+40)/5 = 1 12
Therefore, each first-class mechanic and second-class mechanic can brush the walls of 122 and 1 12 square meters every day.
Solution: countable equation
1.5x=3.5(x-5)
x=8.75
So it turns out that it takes 8.75 minutes to go home from school by car.