Posted by **Aniya** on Sunday, July 13, 2008 at 4:59pm.

A 10-gal aquarium is 3 in. higher than it is wide. Its length is 21 in, and its volume is 2730 in^3. What are the height and width of the aquarium?

x(x+3)......x^2+3x

21(x^2+3x)....

21x^2+63x-2730.....

I am stuck.....I think I am doing it wrong. I have the answers but I dont know how to get there....Help!

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