Respuesta :

tramserran

Answer: 35 rows

Step-by-step explanation:

Let "x" represent the number of rows, then there are "x + 9" number of seats in each row.

x(x + 9) = 1540

x² + 9x = 1540

x² + 9x - 1540 = 0

(x - 35)(x + 44) = 0

(x - 35) = 0           (x + 44) = 0

   x = 35                  x = -44

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