SOLUTION: Suppose the length of a rectanle is 3cm longer than twice the width and that the peimeter is 90cm. Setup an equation for the perimeter involving only W the width. solve this equa

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Question 227928: Suppose the length of a rectanle is 3cm longer than twice the width and that the peimeter is 90cm. Setup an equation for the perimeter involving only W the width. solve this equation algebraically to find length and find the width as well?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
L=2W+3
2L+2W=90
2(2W+3)+2W=90
4W+6+2W=90
6W=90-6
6W=84
W=84/6
W=14 ANS. FOR THE WIDTH.
L=2*14+3=28+3=31 ANS. FOR THE LENGTH.
PROOF:
2*31+2*14=90
62+28=90
90=90