1, solution: Suppose my mother was 7 times older than Mingming x years ago.

7(8 times) =32 times

6x=24

x=4

A: Four years ago, my mother was seven times older than Mingming.

2. Solution: The well depth is x meters.

3(x+4)=6(x+ 1)

3x+ 12=6x+6

3x=6

x=2

6(x+ 1)= 18m

Answer: The well depth is 2m and the rope length is 18m.