解方程组:1/x+1/(y+z)=1/2 1/y+1/(x+z)=1/3 1/z+1/(x+y)=1/4.解方程组:1/x+1/(y+z)=1/2 1/y+1/(x+z)=1/3 1/z+1/(x+y)=1/4.

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解方程组:1/x+1/(y+z)=1/21/y+1/(x+z)=1/31/z+1/(x+y)=1/4.解方程组:1/x+1/(y+z)=1/21/y+1/(x+z)=1/31/z+1/(x+y)=1/

解方程组:1/x+1/(y+z)=1/2 1/y+1/(x+z)=1/3 1/z+1/(x+y)=1/4.解方程组:1/x+1/(y+z)=1/2 1/y+1/(x+z)=1/3 1/z+1/(x+y)=1/4.
解方程组:1/x+1/(y+z)=1/2 1/y+1/(x+z)=1/3 1/z+1/(x+y)=1/4.
解方程组:1/x+1/(y+z)=1/2 1/y+1/(x+z)=1/3 1/z+1/(x+y)=1/4.

解方程组:1/x+1/(y+z)=1/2 1/y+1/(x+z)=1/3 1/z+1/(x+y)=1/4.解方程组:1/x+1/(y+z)=1/2 1/y+1/(x+z)=1/3 1/z+1/(x+y)=1/4.
1/x+1/(y+Z)=1/2
1/y+1/(x+z)=1/3
1/z+1/(x+y)=1/4
三个方程左边通分得
(x+y+z)/(x(y+z)=1/2
(x+y+z)/(y(x+z))=1/3
(x+y+z)/(z(x+y))=1/4
所以
x(y+z)=2(x+y+z) 方程1
y(x+z)=3(x+y+z) 方程2
z(x+y)=4(x+y+z) 方程3
方程1和方程2化简得
(xy+xz)×3=(xy+yz)×2
xy=2yz-3xz
方程1和方程3化简得
2(xy+xz)=xz+yz
2xy=yz-xz
所以4yz-6xz=yz-xz
3yz=5xz
x=0.6y
把x=0.6y 代入方程2xy=yz-xz
1.2y^2=0.4yz
z=3y
把x=0.6y,z=3y代入方程x(y+z)=2(x+y+z)
得出 0.6y×4y=2(0.6y+y+3y)
2.4y^2=9.2y
y=23/6
所以x=0.6×23/6=2.3
z=3×23/6=11.5
所以x=2.3,y=23/6,z=11.5

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