7x 2 5x 1 ) 4 5x 1 July 8, 2019 16 32 64 128 7x 2 5x 1 )+ 4 5x 1 2 7x )( 4 5x )/( 1 5x )( 3 7x )= 1 5x 2 13x 4 )-( 17x 2 7x 19 )+( 5x 7 )( 3x 1 2) 7x - 5(2x + 1) = 5x + 15 7-5x = -2x+1
