若2x+5y+4x=6,3x+y-7x=-4,求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.
若x:y:z=3:4:5=6,求x-y+z分之x+y-z的值
若x/3=y/4=z/5,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/4=y/5=z/6,求x+y+z/3x-2y+z的值.
已知4x-3y-6y=0,x+2y-7z=0.求x-y+z\x+y+z的值
已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值
若4x-3y-6z=0,x+2y-7z=0,求代数式5x*5x+2y*2y-z*z/2x*2x-3y*3y-10z*10
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=2:3:4求X+Y+Z/X-2Y+3X的值
求文档: 若2x+5y+4z=6,3x+y-7y=-5,求x+y+z的值?
已知4x-3y-6z=0,x+2y-7z=0,且x,y,z≠0,求2x+3y+6z/x+5y+5z的值.