Solution: Suppose two cars meet in X hours.
( 1 10+80)x=570 x=3
12 exercise 17 answer to question 12
Solution: Let car B drive at the speed of X kilometers per hour.
(68+x)×3.5=455 x=62
13 exercise 17 answer to question 13
Solution: Set up team B to dig X meters every day.
( 12.6+x)×25 = 675 x = 14.4
14 exercise 17 answer to question 14
Solution: Let Ship B travel at the speed of X kilometers per hour.
(x-32.5)× 18=57.6 x=35.7
15 exercise 17 answer to question 15
3x=x+ 100 x=50
16 practice the answers to seventeen thinking questions
Solution: Let a * * * take x times.
5x=3x+6 x=3
The original table tennis is: 5×3= 15 (pieces)
The original badminton is 3×3+6= 15 (pieces).