解方程组:{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10
解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18
(x+y-z)(x-y+z)=
解方程组 x+y+z=-7 x-y=12 x+y-z=6
解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值
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{3x+y-z=4,2x-y+3z=12,x+y+z=6}
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
解三元一次方程组,100x+10y+z=27(x+y+z) {x+y-z=1 (100z+10y+x)-(100x+10
解方程组2x+y+x=10 x+2y+z=-6 x+y+2z=8
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