5x=3y=2z,求x:y:z
x/2=y/3=z/5 x+3y-z/x-3y+z
2分之x=3分之y=5分之z x+y+z=20 求x,y,z
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.
x+2y+3z=20,x+3y+5z=31,求x+y+z的值
已知x:y:z=3:4:5,3x+2y-4z=18.求:x+y+z.
5x+3y+2z=2011 4x+6y+7z=2012 求x+y+z
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2x+5y+4z=6 3x+y-7z=-4求x+y-z
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3x=4y,2y=5z,试求x:y:z