15 2x =- 7 9 July 8, 2019 16 32 64 128 15 2x =- 7 9x 11x 2x 15 8 7 9x Y 2x 7 9x y 15 11x 2x 15 8 7 9x how many solutions 9x 15 2x 7 14x 18 3x
