A square plywood platform has a perimeter which is 7 times the length of a side, decreased by 12. How do you find the length of a side?

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Answer 1 · 2017-07-04T09:05:04

The length of a side is #28# unit.

The perimeter of square platform with sides #a# is #4a#.

In given condition , #4a =7(a-12) or 4a = 7a -84 or 7a-4a = 84 # or

#3a=84 or a =28# unit

The length of a side is #28# unit [Ans]