1/x-5-1/x-6=1/x-8-1/x-9
答案:2 悬赏:30 手机版
解决时间 2021-02-11 04:31
- 提问者网友：我一贱你就笑
- 2021-02-10 20:32
1/x-5-1/x-6=1/x-8-1/x-9
最佳答案
- 五星知识达人网友：一把行者刀
- 2021-02-10 21:40
1/x-5-1/x-6=1/x-8-1/x-9
(x-6-x+5)/(x-5)(x-6)=(x-9-x+8)/(x-8)(x-9)
-1/(x-5)(x-6)=-1/(x-8)(x-9)
(x-5)(x-6)=(x-8)(x-9)
x²-11x+30=x²-17x+72
-11x+17x=72-30
6x=42
x=7
(x-6-x+5)/(x-5)(x-6)=(x-9-x+8)/(x-8)(x-9)
-1/(x-5)(x-6)=-1/(x-8)(x-9)
(x-5)(x-6)=(x-8)(x-9)
x²-11x+30=x²-17x+72
-11x+17x=72-30
6x=42
x=7
全部回答
- 1楼网友：风格不统一
- 2021-02-10 22:34
1/(x-5)-1/(x-6)=1/(x-8)-1/(x-9)
(x-6-x+5)/(x-5)(x-6)=(x-9-x+8)/(x-8)(x-9)
-1/(x-5)(x-6)=-1/(x-8)(x-9)
(x-5)(x-6)=(x-8)(x-9)
x²-11x+30=x²-17x+72
解得
x=7
(x-6-x+5)/(x-5)(x-6)=(x-9-x+8)/(x-8)(x-9)
-1/(x-5)(x-6)=-1/(x-8)(x-9)
(x-5)(x-6)=(x-8)(x-9)
x²-11x+30=x²-17x+72
解得
x=7
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