Warehouse A is four times as big as warehouse B, and each warehouse transports 10 tons. The grain storage capacity of warehouse A is 9 times that of warehouse B. How many tons did warehouse A and warehouse B originally store?

Solution: Set up the original warehouse B to store X tons of grain.

4x- 10=9(x- 10)

4x- 10=9x-90

5x=80

x= 16

4x=64

A: It turns out that warehouse A has 64 tons of grain and warehouse B has 16 tons of grain.