SOLUTION: A rectangle has width that is 7 more than its length and an area of 30. Find the length and width of the rectangle.

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Question 849962: A rectangle has width that is 7 more than its length and an area of 30. Find the length and width of the rectangle.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A%5Br%5D=L%2AW=30
W=L%2B7
So,
L%2A%28L%2B7%29=30
L%5E2%2B7L-30=0
%28L%2B10%29%28L-3%29=0
Two solutions:
L%2B10=0
L=-10
Not a solution since negative length doesn't make sense.
L-3=0
L=3
then
W=3%2B7=10