Frac 7x 4 4 3 2x July 8, 2019 16 32 64 128 Frac 7x 4 4 + 3 2x Frac 4 x = frac 2 7 Frac 7 Frac 7^ 4 7^ -3 Frac 4 3 = frac x 7 Frac 7+4x 3 -12=-3