SOLUTION: The length of a rectangle is twice the width. The perimeter is 84 cm more than the width. Make a diagram and find the rectangle's dimensions.

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Question 173875: The length of a rectangle is twice the width. The perimeter is 84 cm more than the width. Make a diagram and find the rectangle's dimensions.
Answer by bob123132(33) About Me  (Show Source):
You can put this solution on YOUR website!
Let x=Width
Let 2x=Length
Let x+84=Perimeter
x+84=x+x+2x+2x
combine:
x+84=6x
subract the X on left side to further solve
84=5x
divide each side by 5 to isolate
16.8=x
To prove
2(16.8)+2(33.6)=100.8
then if you subtract 84 from it, it equals the width
So the dimensions are 16.8x33.6