2(x-y)/3-(x+y)/4=-1/12,
8(x-y)-3(x+y)=-1;
5x-11y=-1(1)
3(x+y)-2(2x-y)=3
3x+3y-4x+2y=3;
5y-x=3;
25y-5x=15;
14y=14;
y=1;
x=2;
手機(jī)提問(wèn)的朋友在客戶端右上角評(píng)價(jià)點(diǎn)【滿意】即可.