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题库 / GMATLA-PS-254
When n liters of fuel was added to a tank that was already ~$\frac{1}{3}$~ full, the tank was filled to ~$\frac{7}{9}$~ of its capacity. In terms of n, what is the capacity of the tank, in liters?
~$\frac{10}{9}$~n
~$\frac{4}{3}$~n
~$\frac{3}{2}$~n
~$\frac{9}{4}$~n
~$\frac{7}{3}$~n
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