9x 1 7x 5 =- 20 July 8, 2019 16 32 64 128 9x 1 7x 5 =- 20 answer How to solve 9x 1 7x 5 =- 20 5 x 7 = 35 (9x - 1 1)/7 = (2(5x + 1 1))/9