2y 7 5y 4 6 July 8, 2019 16 32 64 128 7 2y 4 )+ 5y =- 66 2y 7 3 y 5y 4 6y 7 2y 3 )- 5y 6 4 2y 7 2 5/7y 2 5/7y = 5/42
