Solve equation ( 3 0
−1 0
) (
x y
z 0
) − (
x y
z 0
) (
0 1
3 1
) = (
w −1
0 1
) and calculate x, y, z and w.

Cal's go cart has a gas tank with the dimensions shown below. he uses a gas can that holds 11 gallon of gas, to fill the go cart tank. 11 gallon = 231 inches^3 how many full gas cans will it take to fill the go cart's gas tank?