You can put this solution on YOUR website! From (-5/6)x - 8 = -18, we first add 8 to both sides and get
(-5/6)x = -10
Then multiply both sides by the reciprocal of -5/6, that is, we multiply both sides by -6/5:
(-6/5)(-5/6)x = (-6/5)(-10) and voila
x = 12