Question

a theater can seat 391 people .the number of rows is 6 less than the number of seats in each row.how many rows of seats are there.

Answer 1

x(x-6) = 391
x2-6x-391 =0(x-23)(x+17)=0

since the number of seats should be positive,

x = 23

The number of rows is 23 - 6 = 17



( To check our work )

391 / 17 = 23

So, there are 17 rows of seats.