a) 5 (x + 3) = 4 (x - 2) -> ? 5x+2 5x+8 5x+15 = ? 4x-8 4x+2 2+x -> ? 5x+4x 5x-4x 5(4+x) = ? 15-8 8-15 -8-15 -> x = ? -7 7 -23 b) 2 (1 - 3x) = x - 5 -> ? 2-3x 2-6x 3-5x = x - 5 -> ? -6x-x -5x-x -3x-x = ? 5-3 2-5 -5-2 -> ? -6x -7x -4x = ? 2 7 -7 ->x = ? 2/7 = 0.28 -7/7 = -1 -7/-7 = 1