SOLUTION: The area of a rectangle is 20. The length is 3 less than the twice the width. Find the length and width.

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Question 330824: The area of a rectangle is 20. The length is 3 less than the twice the width. Find the length and width.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The area of a rectangle is,
A=L%2AW=20
.
.
.
L=2W-3
Substituting,
%282W-3%29W=20
2W%5E2-3W-20=0
%282W%2B5%29%28W-4%29=0
Only positive W makes sense in this problem.
W-4=0
highlight%28W=4%29
Then
L=2%284%29-3
highlight%28L=5%29