4x 3y 1 2x y 3 July 8, 2019 16 32 64 128 4x 3y 2 2x y 3 1 X 3y 1 4x 3y 2x y 7 2x 3y 1 0 7 4x 3 y by elimination method Giải hệ phương trình 4x 3y 1 2x y 3 4x 3y 1 dan 2x y =- 3
