Tolong ya caranya dgn lengkap thx

3/x+5 - x-4/(x+5)(x-4)
3(x-4) - (x-4) / (x+5)(x-4) =ax-4a/(x+b)(x-c)
2x-8 / (x+5)(x-4) = ax-4a/(x+b)(x-c)
a = 2
b = 5
c = 4
(b-c) :a = 5-4 : 2 = 1:2