y=x,y+4x=15 x+2y=4,2x-3y=1 解方程组

解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1 解方程组：2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16 解方程组 10（x-y)=3(x+y)+15 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=1 解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1 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X+Y/2=3X-2Y=10+6X+Y/4 解方程组x+y/3=x-y/4 2x+3y=11 3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组 要求 解方程组：｛(X-1)(Y+1)=(X+1)(Y+1)｛X(2+Y)-6=Y(X-4) 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组