SOLUTION: the length of arectangle is 3cm less than four times its width.if the perimeter is 38cm,what is the area of the rectangle?

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Question 155641: the length of arectangle is 3cm less than four times its width.if the perimeter is 38cm,what is the area of the rectangle?
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
Given:
W=x
L=4x-3cm
P=38cm
So, P=2%28L%2BW%29
38=2%284x-3%2Bx%29
38=8x-6%2B2x
38%2B6=10x -----> cross%2844%294.4%2Fcross%2810%29=cross%2810%29x%2Fcross%2810%29
x=4.4cm -----------------------------------> Width
4%284.4%29-3cm=17.6-3=14.6cm ------------------> Length
Area=Length%2AWidth
A=14.6%2A4.4
A=64.24cm%5E2
Thank you,
Jojo