Exercise 22 Page 409

First, let's find the additive inverse of the linear expression within the second set of parentheses. To do so, we can distribute $\text{-}1$ into the second set of parentheses. When we do so, we multiply each term of that linear expression by $\text{-}1.$ Now, let's identify which, if any, terms can be combined. Remember, only like terms — constant terms or terms with the same variable — can be combined. In this case, we have two $x\text{-}$terms and two $\text{constants}.$ Let's arrange the like terms in columns. Then, let's perform the addition. Therefore, we get the following result.