SOLUTION: The length of a rectangle is 4 inches less than 3 times the width. The perimeter is 72 inches. Find the length and the width.

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Question 876994: The length of a rectangle is 4 inches less than 3 times the width. The perimeter is 72 inches. Find the length and the width.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
L length, w width
L=3w-4 and 2w+2L=72;
Perimeter simplifies to w%2BL=36, then L=36-w.
Substitute in L definition:
36-w=3w-4
36=4w-4
40=4w
highlight%28w=10%29
Use in L definition, highlight%28L=26%29.