x-2y+z=1,2x+3y-z=2,求3x+8y-3z=?
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
如果,根号x-3+| y-2 |+z^2=2z-1 求 (x+z)^y
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
{x+y+z=1;x+3y+7z=-1;z+5y+8z=-2
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
x/2=y/3=z/5 x+3y-z/x-3y+z
已知x:y:z=1:2:3,x+y+z=24,求x,y,z
已知{x:y:z=1:2:3,x+y+z=12,求x、y、z的值
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
(x-2y+z)/9=(2x+y+3z)/10=-(3x+2y-4z)/3=1 连等,求x,y,z,
2x+3y+z=1 x+y+z=-2 3x-2y-z=-4 求x、y、z
解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值