Помогите решить: 5/(x-5)-1/(x-5)^2 -4=0

Question

Помогите решить: 5/(x-5)-1/(x-5)^2 -4=0

Answer 1

[5(x-5)(x-5) - 1 - 4(x-5)^2]/(x-5)^2=0
[(x-5)^2 - 1]/(x-5)^2=0
1 - 1/(x-5)^2 = 0
1/(x-5)^2=1
(x-5)^2=1
x-5=1
x=6