X 2y 3 y 5 July 8, 2019 16 32 64 128 X 2y 3 5x y 4 X 2y 3 5x 3y =- 11 X 2y 3 5x 3y 2 X 2y 3 2x y 5 X 2y 3 y =- 0 5x X 2y 3 2x 3y =- 5 X 2y 3 x 3y 5 5 x 2y )+ 3 y 2 4 X 2y 5 y 3 X 2y =- 3 3x y 5 X 2y 2 3x y 3 5 X 5 x 3y 2 x 2y 3 y 5 X 2y 3 5x 3y 8 X 2y 3 2x 3y =- 5 elimination X 2y 3 3x 3y 5