4x 7 3 2x 5 =- 1 4 July 8, 2019 16 32 64 128 4x 7 )( 5x 1 )=( 10x 3 )( 2x 4 )+ 5 1 7 4x 5 1 7 2x 3 1 49 7 3 2x 5 )/ 4 1 2 4x 7
