2x 7 4x 3 18 x 2 x July 8, 2019 16 32 64 128 2x 7 2) 2(8x - 7) = 18 - 4(5 - 4x) 2) x ^ 4 - 7x ^ 2 - 18 = 0 7x - 2 = 18 - 3x
