One square table can seat 4 people, two tables can seat 6 people, three tables can seat 8 people, four tables can seat 10 people, and so on. Each additional table can seat two more people, so N tables can seat 4+2(n- 1)=2n+2 people.

10 tables together can seat 2* 10+2=22 people.

Suppose there are 36 people who need X tables in a row to sit down.

2x+2=36

2x=36-2

2x=34

x= 17

A: For 36 people, you need 17 tables in a row to sit down.