-1.6 - 0.9w = 11.6 + 2.4w
-1.6 - 0.9w = 11.6 + 2.4w-2.4w - 0.9w = 11.6 + 1.6-3.3w = 13.2-3.3w/-3.3 = 13.2/-3.3w = -4