Answer
$x=-38$
Work Step by Step
The distributive property allows us to distribute anything multiplied by something inside of the parenthesis to whatever is inside of the parenthesis. Thus, we distribute the 4 to everything inside of the first set of parenthesis and the 5 to everything inside of the second set of parenthesis, giving us the equation 4x-28=5x+10. We now simplify:
$-28=x+10 \\\\ x=-38$