Question

Square paltform has Perimeter 9 times the length of a side decrease by 15. Find the lengnth

Answer 1

9x-15 = 4x --> 9x-4x = 15 --> 5x = 15 --> x = 3 --> x is length

Answer 2

The question is a little ambiguous but I think it means that the side length is decreased by 15, not that 9 times the side length is decreased by 15. If that is the case then:

4x=9(x-15)
4x=9x-135
x=27

Answer 3

if that's the case then yeah, ur rite:)

Answer 4

I agree with jay123's equation formulation, 9x-15 = 4x where x is the square's side length.
x = 3 and the perimeter = 4*3 = 12