3 x 7 4x 2x 8 x July 8, 2019 16 32 64 128 2 7x - 2 8 = 4 2 - 4 3x 3) 8x + 3(7 - 2x) - 4x + 3 4) 23 - 4(3x + 8) - 1 - 17x