Jawapan

2015-10-09T21:23:06+08:00
4x+2y=xy+13
2y-xy=13-4x
y(2-x)=13-4x
y=13-4x/2-x
2015-10-09T22:22:31+08:00
4x +2y = xy +13
2y - xy = 13 -4x
y (2 - x) = 13 -4x
y = (13 - 4x) / (2 - x)