4 2x 1 )-( 5x 9 July 8, 2019 16 32 64 128 4 2x 1 )= 5x 3x 9 3 2x 4 1 5x 9 4 2x 1 )+ 9x 5x 4 4 2x 1 )= 5x 3x 9 how many solutions 14x 4 5x 1 2x 9 180 4 5x 1 6 9 2 2x 5x 9 4 15 2x 1 3
