8x 4 4 x 1 ) 7 July 8, 2019 16 32 64 128 8x 4 4 x 1 )+ 7 8x 4 3 x_1 )+ 7 solution and check 8x 4 3 x_1 )+ 7 check 8x 4 3 x_1 )+ 7 solution answer 8x 4 3 x_1 )+ 7 solution and check step 8x 4 3 x_1 )+ 7 solution and check answer 8x 4 x 3 )= 4 7x 1 8x + 1