Simplify this expression: 13 + (–12) – (–5) = ?
a. 30
b. 6
c. –30
d. –6

13 + (-12) - (-5) =

First, let us simplify our brackets (remove parentheses). Negative and positive signs rules: + and - makes -. 


Second, let's continue to add and subtract now. Let's start off with (13 - 12) which will give us 1. Our problem will look like:  . Easy, (1 + 5) equals 6.