解方程组 x+2y+z=2 x-4y+z=5 2x-2y-5z=0
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
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2x+y-z=7 x+y+z =1 2x-y-z=5
已知x,y,z满足方程组:4x-5y+2z=o;x+4y-3x=0,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=6,x-z=2,2x-y+z=5 解方程组
x:y:z=2:3:5解方程组 2x+3y-z=16
解方程组:x+3y=5.y-2z=5.x+z=5
解方程组{2x+3y+z=11,x+y+z=0,3x-y+z=-2.