当k=何值时,方程组{2x-y=k+1,x+2y=2k的解x=y

当k=何值时,方程组{2x-y=k+1,x+2y=2k的解x=y
当k=何值时,方程组{2x-y=k+1,x+2y=2k的解x=y

当k=何值时,方程组{2x-y=k+1,x+2y=2k的解x=y
2x-y=k+1
x=y
x=k+1
x+2y=2k
3x=2k
3(k+1)=2k
3k+3=2k
k=-3