x+y-z=6,x+y=15,z×x=63.求x,y,z
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(x+y-z)(x-y+z)=
解方程 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(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10
x+y-z=6,x+y=15,z×x=63.求x,y,z
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
已知X.Y.Z满足方程组,X+y-Z=6y+z-x=2z+x-y=0求X.Y.Z的值
X+Y+Z=?
x/y=(x+z)/(y+z)y/z=(x+y)/(x+z)
(1)X+Y=15,Y+Z=-6,Z+X=7.(2)X+Y=-14,Y+Z=-7,Z+X=9.(3)X+Y=0,Y+Z=-1,Z+X=-1.
方程组:{x+y-z=6,x+z=16,x-y+2z=17
x+y+z=6 x+2y+3z=14 y+1=z
已知 x/(y+z)+y/(z+x)+z/(x+y)=1求 (x*x)/(y+z)+(y*y)/(x+z)+(z*z)/(x+y)=?
解方程:x+y+z=6 15x+7y+9z 请问x=?,y=?z=?
方程组3x-y-z=9,2x+y-2z=6,x+y+z=15
若X+6Y+4Z=10 4X+4Y+Z=15求X+Y+Z
x+y+z=4x-5y=y-x+6z,xyz不等0,x:y:z=?
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,