# How do you find the sum of (c-4)+(3c+9)?

Dec 1, 2016

$4 c + 5$

#### Explanation:

Step 1) Remove the parenthesis:

$c - 4 + 3 c + 9$

Step 2) Rearrange to combine like terms:

$c + 3 c - 4 + 9$

$\left(1 c + 3 c\right) + \left(- 4 + 9\right)$
$\left(1 + 3\right) c + 5$
$4 c + 5$