4x-2(40-x)= 1 12

2x+80= 1 12

2x= 1 12-80

x= 16

40- 16=24 (only)

Answer: 16 turtle, 24 cranes.

2. I rented x big boats, so I rented (8-x) small boats for so long.

8x-6(8-x)=38

2x+48=38

2x= 10

x=5

8-5=3 (bar)

I rented five big boats and three small boats.

3. If there are X boys, Momo will have (12-x) girls.

3x-2( 12-x)=32

x+24=32

x=8

12-8=4 (pieces)

A: Eight boys and four girls.