k取何值时,方程组3X+Y=K+1 x+3y=3的解,满足0
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k取何值时,方程组3X+Y=K+1x+3y=3的解,满足0k取何值时,方程组3X+Y=K+1x+3y=3的解,满足0k取何值时,方程组3X+Y=K+1x+3y=3的解,满足03X+Y=K+1x+3y=
k取何值时,方程组3X+Y=K+1 x+3y=3的解,满足0
k取何值时,方程组3X+Y=K+1 x+3y=3的解,满足0
k取何值时,方程组3X+Y=K+1 x+3y=3的解,满足0
3X+Y=K+1
x+3y=3
两式相加 得
4X+4Y=K+4
X+Y=K/4+1
0