解方程组 x+4y=12 x:y=2:1

解方程组{2(x-y)/3 - x+y/4=-1 6(x+y)-41(x-y)=12 1/2x-2y=-74,x-6y=-12解方程组,x／5-y／2=2,2x+3y=4解方程组 解方程组x-4y=-1x-4y=-12x+y=16 解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1 先化简再求值; 解方程组 x(x-y)-y(x+y)+2xy 其中x=2 ,y=-22.x[x-x(x-1)],其中x=-2解方程组4x+3y=12x-y=32.y+1=2x 4x-y=2 3.2x+2y=0 2x-y+24=0 解方程组:(x+3)(y-2)=(x-3)(y+10),(x+1)(y+3)=(x-2)(y+12) 解方程组：x+y/2+x-y/3=6 4(x+y)-5(x-y)=12 要求 解方程组：｛(X-1)(Y+1)=(X+1)(Y+1)｛X(2+Y)-6=Y(X-4) 解方程组2(x-y)/3-x+y/4=-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 解二元一次方程组3(x+y)-4(x-y)=4 x+y/2+x-y/6=1 解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1kkkkkkkk 解方程组3(x+y)-4(x-y)=4,x+y除以2+x-y除以6=1 解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1 解方程组8/(x+y) +(x-y)/2=3,6/(x+y)-(x-y)/4=1 解方程组 2x-y=5 2y/x-x/y=12x-y=52y/x-x/y=1 解二元一次方程组：3(x+y)-4(x-y)=4,x+y/2+x-y/6+1x+y/2+x-y/6+1=1 3x+1=y+2 4y+2=x+12解方程组