Question 1199039

let the number of rows be {{{x}}}

the number of seats in each row will be {{{x + 7}}}

total number of  seats  is  {{{1394}}}


{{{x (x + 7) = 1394}}}

{{{x^2 + 7x - 1394 = 0}}}

{{{(x - 34) (x + 41) = 0}}}

{{{x = 34}}}

or

{{{x=-41 }}} (reject, answer cannot be negative) 


Therefore,

{{{x = 34 }}}

{{{x + 7 = 34+7=41}}}

the number of seats in each row  is  {{{34}}}