其实很简单，答案有两个，过程如下：
（2-x）/(x-3)+3=2/(3-x)
[2-x+3(x-3)]/(x-3)=2/(3-x)
(2x-7)(3-x)=2x-6
(x-3)(2x-5)=0
x=3或2.5
(2-x)/(x-3)+3=2/(3-x)
都乘以(x-3)
(2-x)+3(x-3)= -2
2x-7=-2
x=2.5
(2-x)/(x-3)+3=2/(3-x)
[(2-x)+3(x-3)]/(x-3)=2/(x-3)
2x-7=2
x=4.5
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