若{3x-4y=0,5x=4z,则x分之x+y+z=?
若5分之x=4分之y=3分之z(z不等于0),则3x-2y分之x+y+z的值为
若3分之x+y=5分之y+z=4分之z+x,且xyz不等于0,则x:y:z=
若x:y:z=3:4:5=6,求x-y+z分之x+y-z的值
若x:y:z=3:4:6,则x-y+z分之x+y-z的值为?
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.
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)
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
若{x+3y+10z=0 则 (x+y-z)/(x-y+z)
若3x+7y+z=5,4x+10y+z=3,则x+y+z=?
2x+5y+4z=0,3x+y-7z=0,则x+y-z=?
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
2x+3y-4z=0.,3x+4y+5z=0,则x+y+z/x-y+z详细的解题过程