SOLUTION: A square plywood platform has a perimeter which is 9 times the length of a side, decreased by 15. Find the length of a side. Use the formula P = 4s.

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Question 292632: A square plywood platform has a perimeter which is 9 times the length of a side, decreased by 15. Find the length of a side. Use the formula P = 4s.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
P=4s
9s-15=4s
9s-4s=15
5s=15
s=15/5
s=3 ans. for the length of the side.
Proof:
9*3-15=4*3
27-15=12
12=12