Question 9714
You will not get an even answer with the problem. 

The perimeter of a triangle is {{{P=s1+s2+s3}}}

1st side is = x-8
2nd side is = x
3rd side is = 4(x-8)

Equations - x-8+x+4(X-8)=28
x-8+x+4x-32=28
6x-40=28
6x=68
x = Does is not an equal number.

I hope that gives you a little help.