2(x-y)∕3=x+y∕4+18(x-y)=3(x+y)+125x-11y=12 1)6(x+y)=4(2x-y)+162x-10y=-16x-5y=-8 2)2)×5-1),得-14y=-52y=26/7代入2),得x=74/7
X=20/3Y=44/3