SOLUTION: I have to write an equation to solve this problem... Not really sure how to begin. "the length of a rectangle is 3 cm greater than its width. The perimeter is 24 cm. What are

SOLUTION: I have to write an equation to solve this problem... Not really sure how to begin. "the length of a rectangle is 3 cm greater than its width. The perimeter is 24 cm. What are

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Question 332137: I have to write an equation to solve this problem... Not really sure how to begin.
"the length of a rectangle is 3 cm greater than its width. The perimeter is 24 cm. What are the dimensions?"
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
The formula you need is:
P=2L+2W
L=W+3
24=2(W+3)+2W
24=2W+6+2W
24=4W+6
4W=24-6
4W=18
W=18/4
W=4.5 ANS. FOR THE WIDTH.
L=4.5+3=7.5 ANS. FOR THE LENGTH.
PROOF:
24=2*7.5+2*4,5
24=15+9
24=24
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