SOLUTION: The perimeter of a rectangle is 146 inches. The length is 7 inches shorter than three times the width. Find the length Please help me.!!!

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Question 757632: The perimeter of a rectangle is 146 inches. The length is 7 inches shorter than three times the width. Find the length
Please help me.!!!
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

The perimeter of a rectangle is 146in.
The length is L=3W-7in (if 7in shorter than three times the width)
P=2L%2B2W

2L%2B2W=146in.....simplify, all terms divide by 2
L%2BW=73in.......eq.1 substitute L=3W-7in
3W-7in%2BW=73in
4W=73in%2B7in
4W=80in
W=80in%2F4
highlight%28W=20in%29
now find L
L=3%2A20in-7in
L=60in-7in
highlight%28L=53in%29