# How do you simplify 15d - 9 + 2d?

Jul 10, 2015

Regroup to get $17 d - 9$
$15 d - 9 + 2 d$
$\textcolor{w h i t e}{\text{XXXX}}$$= 15 d + 2 d - 9$
$\textcolor{w h i t e}{\text{XXXX}}$$= \left(15 + 2\right) d - 9$
$\textcolor{w h i t e}{\text{XXXX}}$$= 17 d - 9$