# How do you add 2x + -5x?

Sep 25, 2015

 (2x) + (-5x) = color(green)( -3x

#### Explanation:

The variable $x$ is common to both the terms. So taking the common factor out, we get:

$\left(2 x\right) + \left(- 5 x\right) = x \cdot \left\{2 + \left(- 5\right)\right\}$

$= x \cdot \left\{2 - 5\right\}$

$= x \cdot \left(- 3\right)$

 =color(green)( -3x