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# If a theater seats 810 and the number of rows is 3 less than the number of seats in each row how many rows of seats are there?

$\sqrt{x} x_{123} \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \int\limits^a_b {x} \, dx$