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

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6(x+y)=4(2x-y)+16,2(x-y)/3=x+y/4-1
6(x+y)=4(2x-y)+16,2(x-y)/3=x+y/4-1
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
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 3分之2(X-Y)-4分之X+Y=-1,6(X+Y)-4(2X-Y)=16 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1 已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-( ｛4/(x+y)+6/(x-y)=3 ｛9/(x-y)-1/(x+y)=1 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 已知4x=9y求(1)x+y/y (2)y-x/2x (x+y)(x+2y)(x+3y)(x+4y)=-40