12-2(7x-3)=3(1-2x)-5x
12 - 2(7x - 3) = 3(1-2x) - 5x12 - 14x + 6 = 3 - 6x - 5x-14x + 6x + 5x = 3 - 12 - 6-3x = -15x = -15/-3x = 5