2/x-9=9/x+12 Tolong jawab secepatnya

(2/x)-(9/x) =12+9
-7/x = 21
-7=21x
x=-7/21
x=-1/3

2/x-9=9/x+12
2 (x+12) = 9 (x-9)
2x + 24 = 9x - 81
2x - 9x = -81-24
-7x = -105
x = 15