SOLUTION: if the perimeter is 90 and the length is 7 inches shorter than triple the width, what are the demensions?

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Question 432014: if the perimeter is 90 and the length is 7 inches shorter than triple the width, what are the demensions?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
If you're talking about a rectangle, then 2L+2W = P. Since L = 3W-7, then
2(3W-7)+2W=90
6W-14+2W=90
8W=104
W=13
L=32.