已知3x=4y=6z,求分式x+y-z/x-y+z
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
已知3X=4X,5Y=6Z求X+Y:Y+Z
试一试:已知X/3=Y/4=Z/6不等于0,求分式X+Y-Z/X-Y+Z的值
已知3X+7Y+Z=6 4X+10Y+z=7 求X+Y+Z=?
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
已知x/4=y/5=z/6 求x+y+z/3x-2y+z的值
已知x/4=y/5=z/6,求x+y+z/3x-2y+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.
一条分式数学题已知x y z满足x/x+y + y/z+x + z/x+y =1,求x²/x+y + y&su
已知有理数x、y、z满足条件|x-z-2|+(3x-6y-7)^2+|3y+3z-4|=0,求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)
已知x/2=y/3=z/-1≠0,求分式2x+6y-3z/x+y+2z的值