SOLUTION: If I bought 320ft of fencing material for my yard and my yard is three times as long as it is wide, what is the length of my yard?

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Question 281628: If I bought 320ft of fencing material for my yard and my yard is three times as long as it is wide, what is the length of my yard?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
2L+2W=320
L=3W
2*3W+2W=320
6W+2W=320
8W=320
W=320/8
W=40 ANS.
L=3*40=120 ANS.
PROOF:
2*120+2*40=320
240+80=320
320=320