5x 7 3x 4 1 2x July 8, 2019 16 32 64 128 X 7 )( 3x 2 )-( 5x 1 )( 2x 4 2x 3 1 5x 7 5 3x 4 5 x 7 = 35 5x - 7 = 2 - 4x 7-3x =1-5x