# How do you simplify 12x^3 + -18x^3?

Sep 30, 2015

$- 6 {x}^{3}$

#### Explanation:

Simplify $12 {x}^{3} + - 18 {x}^{3}$
as $12 {x}^{3} - 18 {x}^{3}$

For any value of$\text{ elephants}$
color(white)("XXX")12" elephants" - 18" elephants" = -6" elephants"

Assigning the value of ${x}^{3}$ to $\text{ elephants}$
we have
$\textcolor{w h i t e}{\text{XXX}} 12 {x}^{3} - 18 {x}^{3} = - 6 {x}^{3}$