Solution: Let Xiao Ming's age be X and his mother's age be 3x.

3x-x=24

2x=24

x= 12

12*3=36 (years old)

Answer: (I omit the answer, you answer it yourself)

8. solution: let the smaller number be x,

The other is x+ 1.

x+ 1+x=97

2x+ 1=97

2x=96

x=48

48+ 1=49

A: ...............

9. Solution: X shipments should be made in the afternoon.

5*3+5x=35

15+5x=35

5x=20

x=4

A: .............

I hope it can be adopted, and my answer is correct.