The question is ambiguous.
(28/(9x))-49=99/97, 28/(9x)=49+99/97=4852/97, 1/x=(9/28)(4852/97)=10917/679 and x=0.0622 approx.
(28/9)x-49=99/97, x=10917/679=16.0781 approx.
28/(9x-49)=99/97, 9x-49=28(97/99)=2716/99, 9x=49+2716/99=7567/99, x=7567/891=8.4927 approx.