2x 5y 4 3x 2y 16 0 July 8, 2019 16 32 64 128 2x 5y 4 3x 2y 16 0 by elimination method 2x 5y 4 3x 2y 16 0 by substitution method 2x 5y 4 3x 2y 16 0 by cross multiplication method