a) x + 2
b) [tex]\frac{6x-18}{6}[/tex] = x - 3
c) 2x - 14 - (6 - 2x) = 2x - 14 - 6 + 2x = 4x - 20
d) -[tex]\frac{18a + 12}{6}[/tex] - [tex]\frac{18a-6}{6}[/tex] = [tex]\frac{-18a - 12}{6}[/tex] - [tex]\frac{18a-6}{6}[/tex] = [tex]\frac{-18}{6}[/tex] = -3
