Question

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

Answer 1

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:

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

`7(-2)-2-6(-2)+15` =

`-14-2+12+15` =

`-16+12+15` =

`-16+27=11`