x+y+z=77 y+5=z 4x=z
(x+y-z)(x-y+z)=
X+Y+Z=?
一道数奥题,(x+y-z)²+(y+z-4)=-|z+x-5|
x/2=y/3=z/5 x+3y-z/x-3y+z
1.设X ,Y,Z 成等差数列,代数式(X-Z)*(X-Z)+ 4(X-Y)(Z-Y)=
f(x,y,z,w)=x*(x+y)*(x+y+z)*(x+y+z+w)
已知x+y-z/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
若z分之x+y+z=y分之x-y+z=x分之-x+y+z,求xyz分之(x+y)(y+z)(z+x)
y+z÷x=Z+X÷y=X+Y÷z,X+Y+Z不等0求X+Y-Z÷X+Y+z值
(x+y-z)/z=(y+z-x)/x=(z+x-y)/y 求(x+y)(y+z)(z+x)/xyz
x分之y+z=y分之z+x=z分之x+y(x+y+z不等于0),求x+y+z分之x+y-z
已知3X=4X,5Y=6Z求X+Y:Y+Z