若x+2y+3z=10,4x+3y+2z=15,则x+y+z的值为( )
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( )
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=3:5:7,3x+2y-4z=9,则x+y+z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/3=y/4=z/5,求x+y+z/3x-2y+z的值.
若x:y:z=2:3:4,求x+y+z/x-2y+3z的值
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
x=2,y=-3,z=3则表达式x||y+z&&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?