两边乘x(x-2)
3x=5x-10
x=5
经检验,x=5是方程的解
1/(x+3)+2/(x-3)=1/(x+3)(x-3)
两边乘(x+3)(x-3)
x-3+2x+6=1
x=-2/3
经检验,x=-2/3是方程的解