解方程，在线等

设9-2X=Y
(Y+4)/(Y+2)+(Y+8)/(Y+6)=(Y+10)/(Y+8)+(Y+2)/Y
1+2/(Y+2)+1+2/(Y+6)=1+2/(Y+8)+1+2/Y
2/(Y+2)+2/(Y+6)=2/(Y+8)+2/Y
1/(Y+2)+1/(Y+6)=1/(Y+8)+1/Y
(Y+6+Y+2)/(Y方+8Y+12)=(Y+Y+8)/(Y方+8Y)
Y方+8Y+12=Y方+8Y 不成立
则2Y+8=0 Y=-4
9-2X=-4
2X=13
X=13/2

13-2x/11-2x + 17-2x/15-2x = 19-2x/17-2x + 11-2x/9-2x
解:11-2x+2/11-2x + 15-2x+2/15-2x=17-2x+2/17-2x + 9-2x+2/9-2x
2/11-2x + 2/15-2x=2/17-2x + 2/9-2x
后来怎么做我也不知道，你想想吧

这么麻烦··