Question

6(x+y)=4(2x-y)+16,2(x-y)/3=x+y/4-1

Answer 1

2(x-y)/3-(x+y)/4=-1.16(x+y）-4(2x-y)=16.2由1式得8(x-y)-3(x+y)=-128x-8y-3x-3y=-125x-11y=-12.3由2式得6x+6y-8x+4y=16-2x+10y=16x-5y=-8.43式-4式*5得14y=28y=2将y=2代入4式得x-5*2=-8x=2所以x=2,y=2