7 rows of seat in the theater each rows hold 2 more than the row behind. The row seats 14 people. How many people can sit in the back row, what is the total number of people that could sit in the theater

Row 1 = 14

Row 2 = 14 + 2 = 16

Row 3 = 16 + 2 = 18

Row 4 = 18 + 2 = 20

Row 5 = 20 + 2 = 22

Row 6 = 22 + 2 = 24

Row 7 = 24 + 2 = 26

So 26 people sit in the back and when all added up you get 140 people in the whole theater.

If there are 7 rows and the first row has 14 seat and each row behind another add 2 seats so, 14+16+18+20+22+24+26 = 140people that could sit in the theater.