如果x+2y+3z=14,2x+3y+z=11,求3x+4y-z的值.
如果x+4/3=y+z/2=z+8/4,且x+y+z=12,求x,y,z的值.
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
x/3=y/4=z/5,求x+y+z/3x-2y+z的值,
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
x:y:z=2:3:4 求 3x+2y-z/x+y+z 的值
已知2x=3y=4z求2x-y+z分之x+y+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
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值