SOLUTION: A 12-foot rectangular board is cut into two pieces so that one piece is four times as long as the other. How long is the bigger piece?

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Question 386874: A 12-foot rectangular board is cut into two pieces so that one piece is four times as long as the other. How long is the bigger piece?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
4x+x=12
5x=12
x=2.4
4x=9.6