When finding the value of X with the ration of the perimeters is 2 : 5 we have X as one polygon and 15 on the other polygon. What is X?

So the perimiter are 2:5

x is one polygon and 15 is the other

so it is either 2:5=x:15 or 2:5=15:x

I would assume that it is 2:5=x:15 so

2 units=x and 5 units=15

5 units=15

dvide 5

1 unit=3

so 2 units=2 times 3=6

so the x=6

or

if 2:5=15:x then

2 units=15 and 5 units=x

2 units = 15

divide 2

1 unit=7.5

5 units=5 times 7.5=37.5

so x=37.5

x could be 6 or 37.5, depending on weather 2:5=x:15 or 2:5=15:x