Question

A restaurant has a total of 30 tables which are

are of two types. The first type seats two people
at each table; the second type seats five people at
people at each table. A total of 81 people are
when all seats are occupied. How many tables are there?

Answer 1

7 five people tables and 23 two people tables

Explanation:

this is the equation I used:

(81-(5×7))/2=23

I don't know how to explain it in words...sorry