解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18
解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18
解方程组 x+y+z=-7 x-y=12 x+y-z=6
(x+y-z)(x-y+z)=
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
已知x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
X+Y+Z=?
解方程组6x=4y=3z,x+y+z=18
解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7.
解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
已知x,y,z满足方程组{x+y-z=6{y+z-x=2{z+x_y=0,求x,y,z的值
解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值