解方程组{x=y=z x=2y=5z x=4y
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
解方程组{z=x+y 3x-2y-2z=-5 2x+y-z=3
解方程组 z=x+y 2x-3y+2z=5 x+2y-z=3
解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18
解方程组2x+y-z=7 x+y+z =1 2x-y-z=5
解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7.
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
x+y/2=z+x/3+y=z/4,...x+y+z=27.解方程组.
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
已知x.y.z满足方程组x+2y-4z=0 2x+y-5z=0 求x:y:z的值
解三元一次方程组:x+y+z=6,y-z=4,x-y-2z=3,
解方程组:{x/2=y/3=z/4 2x+y+z=22