SOLUTION: how do you get the area of a rectangle when a perimeter of 30 feet is given and the length of the rectangle is four times the width?

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Question 311777: how do you get the area of a rectangle when a perimeter of 30 feet is given and the length of the rectangle is four times the width?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
2x+2(4x)=30
2x+8x=30
10x=30
x=3
4x=12
3*12=36 sq ft