⑥ Solution: Let one unknown be x and the other be X+ 1.

X+X+ 1=97

X+X+ 1- 1=97- 1

2X=96

2x \2 = 96 \2

X=48

48+ 1=49

A: One number is 48 and the other is 49.

⑦ Solution: If the rabbit has 4X legs, the chicken has 2X legs.

4X+2x=48

(2+4)x=48

6x=48

6x÷6=48÷6

x=8

A: There are 8 chickens and 8 rabbits in each group.

Solution 8: Suppose Xiaoming is X years old and his mother is 3x years old.

3x-x=24

(3- 1)x=24

2x=24

2×2 = 24×2

X= 12

12+24=36 (years old)

A: Xiaoming 12 years old, and his mother is 36 years old.