Simplify the expression (7x+1/2) + (6x-9 1/2)

To make this easier to read, I'll be substituting 1/2 for. 5; they mean the same thing, but it's less confusing to type it in its decimal form.

7x +.5 + 6x - 9.5

Combine like terms (x's can be added together, and so can reg. numbers)

(7x + 6x) + (.5 - 9.5)

13x - 9