# How do you combine like terms in (5x ^ { 3} - 7x ) + ( 7x ^ { 3} + 5x )?

Mar 22, 2017

See the entire solution process below:

#### Explanation:

First, remove the parenthesis:

$5 {x}^{3} - 7 x + 7 {x}^{3} + 5 x$

Next, group like terms:

$5 {x}^{3} + 7 {x}^{3} - 7 x + 5 x$

Now, combine like terms:

$\left(5 + 7\right) {x}^{3} + \left(- 7 + 5\right) x$

$12 {x}^{3} - 2 x$