Exercise 1 Page 57

The first step in simplifying this expression is to identify which, if any, terms can be combined. Remember, only like terms — constant terms or terms with the same variable— can be combined.

$$\begin{array}{c}7s-s\end{array}$$

In this case, we have two $s\text{-terms}.$ Therefore we will evaluate the difference between the like terms to simplify the expression.

$7s-s$

SubTerm

Subtract term

$6s$