SOLUTION: The perimeter of a rectangular field is 660 yards. If the width is 20 yards less than the length, than what is the length?

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Question 661395: The perimeter of a rectangular field is 660 yards. If the width is 20 yards less than the length, than what is the length?
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
p = 2(l+w) = 2l+2w = 660
w= l - 20
Substitute w into the equation
660 = 2l + 2(l-20)
660 = 2l + 2l - 40
660 = 4l - 40
620 = 4l
155 yd = length