3A + (- 8A + 2) - (3-4A) where a = - 2 / 1

3A + (- 8A + 2) - (3-4A) where a = - 2 / 1

3a+(-8a+2)-(3-4a)
=3a-8a+2-3+4a
=-a-1
=2/1-1
=-2/1