4 - 1/2 (x + 5) =16
4 - 1/2x - 5/2 = 16 distribute the -1/2 to the terms inside the parentheses
4 - 5/2 - 16 = 1/2x combine like terms
-14.5 = 1/2x simplify algebraically
x = -14.5 / (1/2) = -29 divide both sides by 1/2
so the end value that it's after here is x = -29