X 2y 4 3x 6y 12 July 8, 2019 16 32 64 128 X 2y 4 3x 6y 12 graphically X 2y 4 3x 6y 12 simultaneous equation X 2y 4 3x 6y 12 are consistent or inconsistent 3x + 2y = 6 6xy - 4y + 6 - 9x