SOLUTION: Im haveing a problem figureing out how to set this equation up. a rectangle has a perimeter of 54 inches. the length of the rectangle is one less then three times the width. fin

Question 268554: Im haveing a problem figureing out how to set this equation up. a rectangle has a perimeter of 54 inches. the length of the rectangle is one less then three times the width. find the length and width of the rectangle
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
L=3W-1
2L+2W=54
2(3W-1)+2W=54
6W-2+2W=54
8W=54+2
8W=56
W=56/8
W=56/8
W=7 ANS. FOR THE WIDTH.
L=3*7-1
L=21-1=20 ANS. FOR THE LENGTH.
PROOF:
2*20+2*7=54
40+14=54
54=54
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