解方程:x⼀(x-2)+(x-9)⼀(x-7)=(x+1)⼀(x-1)+(x-8)⼀(x-6)

2024-11-24 23:50:00
推荐回答(2个)
回答1:

解:
x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(x-6)
因为x/x-2=(x-2+2)/x-2=1+2/x-2.其他类孙羡似。
即 1+2/(x-2)+1-2/(x-7)=1+2/(x-1)+1-2/(x-6)
1/(x-2)-1/(x-7)=1/(x-1)-1/(x-6)
可得-5/(x-2)(x-7)=-5/(x-1)(x-6)
(x-2)(x-7)=(x-1)(x-6)
化简得:-9x+14=掘卖-判凯逗7x+6
解得x=4
经检验x=4是原方程的根。

回答2:

方程解:通分局脊 (2x^2-18x+18)宽兆/(x^2-9x+14)=(2x^2-14x+2)/(x^2-7x+6)
(慎腊租x^2-9x+9)/(x^2-9x+14)=(x^2-17x+1)/(x^2-7x+6)
1-5/(x^2-9x+14)=1-5(x^2-7x+6)
则可以知道 x^2-9x+14=x^2-7x+6
求的X=4