Question 128129
{{{-15+8x=-31}}}

First let us add 15 to each side of the equation

{{{-15+15+8x=-31+15}}}  Simplify to leave us with {{{8x=-16}}}

Now divide each side by 8 to solve for x {{{(8/8)x=(-16/8)}}}

Simplified down this is {{{x=-2}}}

Check

{{{-15+8(-2)=-31}}}  Simplified to {{{-15+(-16)=-31}}} to {{{-31=-31}}}