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

1 Answer
Jul 2, 2015

Answer:

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#