# How do you solve 7g + 2g = 18?

Oct 21, 2017

$g = 2$

#### Explanation:

Combine like terms on the left side:

$\textcolor{b l u e}{7 g + 2 g} = 18$

$9 g = 18$

Divide $9$ from both sides to solve for $g$

$\frac{\cancel{9 g}}{\cancel{\textcolor{red}{9}}} = \frac{18}{\textcolor{red}{9}}$

$g = 2$

Oct 22, 2017

On the LHS, both are variables, so they can be added easily( it is like adding a number)
$9 g = 18$
Now, the 9 on the LHS will go to the RHS as $\frac{18}{9}$ because on the LHS it is in multiplication$\left(9 \times g\right)$ so on RHS it will inverse,
$g = \frac{18}{9}$
$g = 2$