1/x-7+1/x-4=1/x-6+1/x-5怎么算?分式方程在线等具体点最后把步骤说明白_数学解答

1/x-7+1/x-4=1/x-6+1/x-5怎么算?分式方程在线等
具体点最后把步骤说明白

人气：232 ℃　时间：2020-04-19 01:22:15

解答

1/x-7+1/x-4=1/x-6+1/x-5
1/x-7-1/x-6=1/x-5-1/(x-4)
1/(x-6)(x-7)=1/(x-4)(x-5)
(x-6)(x-7)=(x-4)(x-5)
x^2-13x+42=x^2-9x+20
4x=22
x=11/2