现有一道题,已知x/2=y/3=z/4,求分式(x+2y-z)/(x+y-3z)
已知X/2=y/3=z/4,试求x+y-z/x+y+z的值 (这是初二分式) 要过程
已知x+y-z/z=x-y+z/y=-x+y+z/x,且xyz不等于0,求分式[(x+y)(x+z)(y+z)]/xyz
已知x/3=y/4=z/2,求x+2y-z/x+y+z=?
已知x:y:z=3:4:5,3x+2y-4z=18.求:x+y+z.
已知2x=3y=4z求2x-y+z分之x+y+z的值
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
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3x=4y,2y=5z,试求x:y:z