3 4 x 7 25 3 4 x 18 25 July 8, 2019 16 32 64 128 - 3 4/7 * x = 25/28 3 25 x 4 3) 2 x + 3 x - 18 = x - 7 x + 15 4) 4 x + 5 x - 3 = 2 x + 11
