# How do you evaluate 7x - 2 - 6x + 15 for x = -2?

Jul 2, 2015

Substitute $- 2$ for each $x$. Multiply the coefficients of the $x$ terms times $- 2$. Then add or subtract as appropriate from left to right.

#### Explanation:

$7 x - 2 - 6 x + 15$ =

$7 \left(- 2\right) - 2 - 6 \left(- 2\right) + 15$ =

$- 14 - 2 + 12 + 15$ =

$- 16 + 12 + 15$ =

$- 16 + 27 = 11$