已知x+y/2=y+z/3=x+z/4=-2,求x+2y+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
已知x:y:z=2:3:4求x-y+z分之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x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
已知x+2y+3z=2 3x+y+2z=3 2x+3y+z=4求X+Y+Z的值
已知:x+2y+3z=2,3x+y+2z=3,2x+3y+z=4,求x+y+z的值
已知x+y/2=y+z/3=z+x/4,且x+2y+z=12,求x-2y+z的值
已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值