3 x 6 1 3 4 7 July 8, 2019 16 32 64 128 3 5 8 1 2 x 6 3 4 7 8 3 x 5 )- 1 6 2x 3 xy )- 7y =- 4 3 6 x 1/3 3 x-5=x+3 6 x 3 - 1