b =- 17y = 4y =- 17y = 15。

2( 1)m =-22(2)x =-3(3)f = 3(4)x = 12

b=77 y=-7.25 g=3 y=-4

3 ( 1)x=2 (2)x=2

y=3 y=2

4 (1) x = 29 in 9 (2) x = 5.

Y = 65438+ 139 y=0。

Z= 18 part 19 z=-3.

5. Warehouse 1 is 240 tons, and Warehouse 2 is 2 10 tons.

6. A ran the third lap and B ran the sixth lap.

7. Four pieces of type A and seven pieces of type B. ..

8. The vat is 13/24 and the keg is 7/24.

9. No.

10. Number

1 1.b uphill 1.2KM, downhill 1.5KM, flat road1.3km.