3 x 4 2x 9 12 x 2 July 8, 2019 16 32 64 128 12 - 4(x - 3) = 39 - 9x 12 3x - 4 9 = 2 3x + 9 6 3) 12 - 4(x - 3) = 39 - 9x 3 x 3 = 9