# If p = 0.75 and q = -1.6, evaluate: p + q - ( -0.7)?

Apr 20, 2016

$= - 0.15$

#### Explanation:

Do to this, we'll use a method known as substitution. Basically, (in this case) whenever we see the letter $p$ or $q$, we'll replace it with something else.

$p + q - \left(- 0.7\right) = \left(0.75\right) + \left(- 1.6\right) - \left(- 0.7\right)$
$= 0.75 - 1.6 + 0.7$
$= - 0.15$

If you need further explanation of substitution, please say so