Expand the whole equation first:
5x + 10 + 3x = 8x+8 + 2
Simplify: 8x + 10 = 8x + 8 + 2
So, 8x + 10 = 8x + 10
There are infinitely many solutions, since both sides are equal.
**A website that breaks everything down and could possibly help you is cymath.com**
~Hope this helped & Good luck!