3y 9 4y 5 July 8, 2019 16 32 64 128 2x 3y 9 3x 4y 5 3x 3y 9 5x 4y 10 8x 3y =- 9 5x 4y 12 2x 3y 9 3x 4y 5 by substitution method 2x 3y 9 3x 4y 5 by elimination method 2x 3y 9 3x 4y 5 by cross multiplication 4x 3y 9 3x 4y 5 3y 7 4y 9 1 5 4y 9 3y 5 =- 14 3y 9 2y 5 6y 4y 7 5x 3y 9 2x 4y 40
