若x/2=y/3=z/6,求(3x+4y-2z)/(x-y+3x)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.
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
若x/2=y/3=z/4不等于0,求x+y+z/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2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
若X:Y:Z=2:3:4求X+Y+Z/X-2Y+3X的值
已知4x-3y-6y=0,x+2y-7z=0.求x-y+z\x+y+z的值
已知x/2=y/4=z/7,求①x:y:z.②若2x+y+3z=58,分别求x,y,z的值.③求x+y/x+z的值.
若x:y:z=3:4:5=6,求x-y+z分之x+y-z的值
x/3=y/4=z/5,求x+y+z/3x-2y+z的值,