# How do you evaluate 9p - 5q + 9- 5p + 5q - 6?

Jan 10, 2018

We must collect like terms and simplify: See below

#### Explanation:

We must first take into consideration the variables and constants within the expression.

We have a $p$, $q$ and a normal number (constant).

Now we collect like terms and simply:

$9 p - 5 p = 4 p$
$- 5 q + 5 q = 0$
$9 - 6 = 3$

Now we literally we put the terms together:

$\therefore$ final answer $= 4 p + 3$