# How do you combine 3x+ -5+(-7x)+2?

Jul 7, 2018

$- 4 x - 3$

#### Explanation:

$3 x + - 5 + \left(- 7 x\right) + 2$

Adding a negative number is the same thing as without the addition sign, so it becomes:
$3 x - 5 - 7 x + 2$

Color-code like terms:
$\textcolor{red}{3 x} \quad \textcolor{b l u e}{- \quad 5} \quad \textcolor{red}{- \quad 7 x} \quad \textcolor{b l u e}{+ \quad 2}$

Combine like terms:
$- 4 x - 3$

Hope this helps!