3x y 4 0 6x 2y 4 0 July 8, 2019 16 32 64 128 3x y 4 0 6x 2y 4 0 by graphical method 3x y 4 0 6x 2y 4 0 by substitution method 3x y 4 0 6x 2y 8 0 3x + 2y = 6
