SOLUTION: The length of a rectangle is 4 cm longer than the width. If the perimeter of the rectangle is 20 centimeters, what is the area of the rectangle.

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Question 310743: The length of a rectangle is 4 cm longer than the width. If the perimeter of the rectangle is 20 centimeters, what is the area of the rectangle.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
L=W+4
P=2L+2W
20=2(W+4)+2W
20=2W+8+2W
20=4W+8
4W=20-8
4W=12
W=12/4
W=3 ANS. FOR THE WIDTH.
L=3+4=7 ANS FOR THE LENGTH.
PROOF:
20=2*3+2*7
20=6+14
20=20