x+y+z=4x-5y=y-x+6z,xyz不等0,x:y:z=?
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x+y+z=4x-5y=y-x+6z,xyz不等0,x:y:z=?
x+y+z=4x-5y=y-x+6z,xyz不等0,x:y:z=?
x+y+z=4x-5y=y-x+6z,xyz不等0,x:y:z=?
x+y+z=4x-5y=y-x+6z
x+y+z=y-x+6z
2x=5z,x=5z/2,
代入
x+y+z=4x-5y
5z/2+y+z=4*5z/2-5y
6y=13z/2,y=13z/12
xyz不等0,
所以x:y:z=(5z/2):(13z/12):z=30:13:12.
x+y+z=4x-5y=y-x+6z 取X+Y+Z=Y-X+6Z 有2X=5Z,X=5Z/2 取X+Y+Z=4X-5Y,把2X=5Z代入 有Y=13Z/12 则X:Y:Z=5/2:13/12:1
因为x+y+z=y-x+6z 所以5z=2x x:z=5:2 又因为x+y+z=4x-5y 所以:6y+z=3x 把5z=2x代入上氏 则6y+2/5x=3x 所以6y=13/5x x:y=30:13 所以x:y:z=30:13:12
ADM
(x+y-z)(x-y+z)=
x+y+z=4x-5y=y-x+6z,xyz不等0,x:y:z=?
已知3X=4X,5Y=6Z求X+Y:Y+Z
X+Y+Z=?
x/y=(x+z)/(y+z)y/z=(x+y)/(x+z)
已知 x/(y+z)+y/(z+x)+z/(x+y)=1求 (x*x)/(y+z)+(y*y)/(x+z)+(z*z)/(x+y)=?
(x+y):(y+z):(z+x)=3:4:5 3x+y-z=-4已知(x+y):(y+z):(z+x)=3:4:5 ;3x+y-z=-4求x y z
(y+z)/x=(z+x)/y=(x+y)/z求x+y-z/x+y+z的值
z+=x>y?++x:
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
x-y+z=-1 5x+2y-z=6 4x-3y+2z=-5
2x+5y+4z=6,3x+y-7z=-4,x+y-z=?
x+y+z=1 4x+5y-z=6 x+2y-z=3
解方程组x+y+z=6 x+2y-3z=4 2x-y+z=5
{2x+3y-4z=-5 x+y+z=6 x-y+3z=10
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
已知x/4=y/5=z/6 求x+y+z/3x-2y+z的值