7x 10y 4 2x 5y =- 1 July 8, 2019 16 32 64 128 7x-10y=5 (4x + 1)/3 - (5x - 3y)/4 =3 7 x 10 7x - y = 10 5x + y = 2 (7x + 10y) (7x - 10y)
