 
<translate> Tunda Maryamu ta fara yin kilo 99, bayan da ta sauke kilo goma sha biyu sai ta yi kilo 99 - 12 = kilo 87. Sau biyu nauyin da ta rasa a farko shine 12 * 2 = 24 fam. Don haka, lokacin da ta ƙara nauyin da ta rasa sau biyu, nauyinta ya ƙaru zuwa 87 + 24 = 111 fam. Sau uku fiye da yadda ta rasa a farko shine 12 * 3 = 36 fam. Saboda haka, sa'ad da Mary ta yi hasarar sau 3 fiye da yadda ta yi a farko, nauyinta ya ragu zuwa 111 - 36 = fam 75. A ƙarshe, sa'ad da Maryamu ta sake yin fam ɗari, nauyinta na ƙarshe ya kai fam ɗari da biyar da tara. Saboda haka, amsar ita ce 81. <eng> Since Mary first weighed 99 pounds, after she dropped a dozen pounds she weighed 99 - 12 = 87 pounds. Twice the weight she initially lost is 12 * 2 = 24 pounds. So, when she added back twice the weight that she initially lost, her weight jumped to 87 + 24 = 111 pounds. Three times more than she initially had lost is 12 * 3 = 36 pounds. Therefore, when Mary lost 3 times more than she initially lost, her weight dropped to 111 - 36 = 75 pounds. Finally, when Mary gained back half of a dozen pounds, her final weight was 75 + 6 = 81 pounds.
Thus, the answer is 81. 