若x/2=y/3=z/4≠0,则(2x-y+4z)/3y的值为_______.
若x/2=y/3=z/4≠0,则(2x-y+4z)/3y的值为_______.
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x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+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.
若x+2y+3z=10,4x+3y+2z=15,则x+y+z的值为( )
5,若x+2y+3z=10,4x+3y+2z=15,则x+y+z的值为( )
若2x+5y-4z=0,3x+9y-7z=0,则x+y-z的值为
若x:y:z=3:5:7,3x+2y-4z=9,则x+y+z的值为( )
若4x=7y+5z,2x+y=z,则x:y:z的值为
若x:y:z=3:4:6,则x-y+z分之x+y-z的值为?
若x,y,z均为实数,且(x-1)²+|y+2|+根号(z-3)²=0则x,y,z的值分别为?