1/(x+5)+1/(x-8)=1/(x+6)+1/(x+7)怎么解?简单方法!

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1/(x+5)+1/(x-8)=1/(x+6)+1/(x+7)怎么解?简单方法!

1/(x+5)+1/(x-8)=1/(x+6)+1/(x+7)应为1/(x+5)+1/(x+8)=1/(x+6)+1/(x+7)
1/(x+5)-1/(x+6)=1/(x+7)-1/(x+8)
1/(x+5)(x+6)=1/(x+7)(x+8)
(x+5)(x+6)=(x+7)(x+8)
解得x=-13/2