15 4x 9 x July 8, 2019 16 32 64 128 4x 15 =- 7 9 x 4x 15 9 x 8 4x 15 9x 9 4x 15 9x 9 180 4x 9 15 x 3 5 1 15 32 4x 9 solve for x 5x 15 4x 6x x 9 5x 15 4x 6x 3 x 9 4x 9 15 solve for x 15 x 4/9 15 x 40 15x 9