X+Y=52 X+Z=53 Z+Y=55 求X,Y,Z分别等于多少?
x+y=10 y+z=15 z+x=20 求x,y,z等于多少?
X+Y+Z=200,1/3X+4Y+5Z=200,求X,Y,Z等于多少?
(x+y-z)(x-y+z)=
已知x-y+z=0,求(x²-y²-z²)-4y²z²等于多少?
x y z x+y--- = --- = ---- ----y+Z z+x x+y ,求 z 的值 .求 x+y----
x+y分之一=1,y+z分之一=1,求z+x分之一等于多少
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:(x+y-z)/z=(x-y+z)/y+(y+z-x)/x,且xyz≠0,求代数式[(x+y)(y+z)(x+z)