9 4x-7 8x July 8, 2019 16 32 64 128 9 4x-7 8x+0 52=1 9 4x 7 8x 0526 1 9 4x 7 8x 9 3 4x 7 8x 10 9 8x 7 4x 12 9 x 8 =
