SOLUTION: The length of a rectangle is twice the width. The perimeter is 24 units. What are the length and width?

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Question 804451: The length of a rectangle is twice the width. The perimeter is 24 units. What are the length and width?
Answer by erica65404(394) About Me  (Show Source):
You can put this solution on YOUR website!
Perimeter=length+length+width+width
P=2length+2width
24=2L%2B2W
L=2W
plug into perimeter equation to find the width
24=2%282W%29%2B2W
24=6W
W=4
plug width into perimeter equation
24=2L%2B2%284%29
24=2L%2B8
16=2L
L=8
The answer is: the length is 8 units and the width is 4 units.