5 2x )-( 7 10x July 8, 2019 16 32 64 128 5 2x 7 )= 10x 35 8x 2x 7 10x 2 5 5 (- 2x 7 )+ 3 =- 10x 38 8 2x 7 )+ 5 10x 1 7 2x 5 )= 10x 47 5 2x 5 x 3 7 8x 10x 2