SOLUTION: The length of a rectangle is 5 feet less than the width. The perimeter of the rectangle is 90 feet. Find the length.

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Question 162660: The length of a rectangle is 5 feet less than the width. The perimeter of the rectangle is 90 feet. Find the length.
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
The length of a rectangle is 5 feet less than the width. The perimeter of the rectangle is 90 feet. Find the length.

L=W-5ft
P=2%28L%2BW%29, working eqn
Then,
90ft=2%28W-5%2BW%29
90=2%282W-5%29 ----> 90=4W-10 ----> 90%2B10=4W
cross%284%29W%2Fcross%284%29=cross%28100%2925%2Fcross%284%29
W=25ft
L=25-5=20ft ANSWER
Go back working eqn,
90=2%2825%2B20%29
90=2%2845%29
90ft=90ft
Thank you,
Jojo