若3x+2y+4z=4,x-y+z=2,求x+4y+2z的值.
若x:y:z=2:3:4,求x+y+z/x-2y+3z的值
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.
若x/2=y/3=z/4不等于0,求x+y+z/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.
已知2x=3y=4z求2x-y+z分之x+y+z的值
x:y:z=2:3:4 求 3x+2y-z/x+y+z 的值
x/3=y/4=z/5,求x+y+z/3x-2y+z的值,
已知x:y:z=2:3:4,且x-y+z=36,求x+y+z的值.
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=2:3:4,且x+y+z=18,求x,y,z的值
已知x:y:z=2:3:4求x-y+z分之x+y-z的值