A ten-gallon aquarium is 3 inches taller than it is wide. It's length is 21 inches, and it's volume is 2,730in. What are the height & width of the aquarium?
H = W + 3
2730 = H * W * 21 = (W+3) * W * 21
Solve for W then H.
2730 = H * W * 21 = (W+3) * W * 21
Solve for W then H.