7 2 4x 8 )=- 9 July 8, 2019 16 32 64 128 9x 4 2 8 4x )+ 7 3 2 7 4x =- 9 8 2 4x 8 )= 7 x 9 5x 7 )( 9x 2 4x 8 7 2 x 3 6 9 4x 8 2 4x+x=79 9 2 4-x=8 7
