SOLUTION: the length of a rectangle is 2.5 its width the perimeter is 84 cm. what is the dimensions of the rectangle?

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Question 996835: the length of a rectangle is 2.5 its width the perimeter is 84 cm. what is the dimensions of the rectangle?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
2x+2(2.5x)=84
2x+5x=84
7x=84
x=84/7
x=12
2.5x=30