6(3x + 2) - 5(6x - 1) = 6(x - 3) - 5(7x - 6) + 12x
Sol: 6(3x + 2) - 5(6x - 1) = 6(x - 3) - 5(7x - 6) + 12x 18x + 12 - 30x + 5 = 6x - 18 - 35x + 30 + 12x 17 - 12x = - 17x + 12 17x - 12x = 12 - 17 5x = - 5 x = -1.