(z-x)2=4(x-y)(y-z),求2x+2z-4y=
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
1.已知x,y,z满足2│x-y│+(根号2y-z)+z平方-z+(1/4)=0,求x,y,z值.
(z-x)2=4(x-y)(y-z),求2x+2z-4y=
x^2+y^2+z^2+4x+4y+4z+1=0,求x+y+z
x^2+y^2+z^2+4x+4y+4z+1=0求x+y+z
x^2+y^2+z^2+4x+4y+4z+1=0 求x+y+z
已知2x+5y+4z=6.3x+y-7z=-4 求 x+2y+z
已知x+4y+z=24,2x+7y=2z=41,求x+y+z
已知x/3=y/4=z/2,求x+2y-z/x+y+z=?
x*x+y*y+2z*z-2x+4y+4z+7=0,求xyz的值
已知2x=3y=4z求2x-y+z分之x+y+z的值
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z