[tex]\frac{x}{2} -18=-28[/tex] Add 18 on both sides
[tex]\frac{x}{2} -18+18=-28+18[/tex]
[tex]\frac{x}{2}=-10[/tex] Multiply 2 on both sides
[tex](2)\frac{x}{2} =-10(2)[/tex]
x = -20
[proof]
[tex]\frac{x}{2} -18=-28[/tex]
[tex]\frac{-20}{2}-18=-28[/tex]
-10 - 18 = -28
-28 = -28
