Question 1125667
Let {{{ n }}} = number of rows
{{{ n - 10 }}} = seats in each row
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I can say:
{{{ n*( n - 10 ) = 1200 }}}
{{{ n^2 - 10n - 1200 = 0 }}}
{{{ ( n - 40 )*( n + 30 ) = 0 }}} ( by inspection )
{{{ n = 40 }}}
And
{{{ n - 10 = 30 }}}
There are 30 seats in each row