7 3a 4b July 8, 2019 16 32 64 128 3a 7 =- 4b 1 3a 4b 7 5a 3b 8 3a 7 =- 4b 1 b 3a 7 =- 4b 1 answer 5a 2b 7 3a 4b 4b 7 3a 8b
