3(x+y)-4(x-y)=4，①x+y/2+x-y/6=1 ，则3(x+y)+(x-y)=6②②-①,得5(x-y)=2,解得x-y=2/5③代入②，得x+y=28/15④③+④,得2x=34/15，解得x=17/15代入③，解得y=11/15
