Question

There are 70 people seated at tables. each table holds to people. How many empty seats are there.​

Answer 1

Answer:

8

Step-by-step explanation:

Let x = table with 4 seats

 

Let y = table with 5 seats  

 

x + y =  total tables = 19

 

4x + 5y = total seats = 84

 

4x + 5y = 84

 

x + y = 19

 

Multiply the bottom equation by 4

 

4x + 4y = 76

 

Subtract this equation from the first one you get

 

y = 8

 

There are 8 tables with 5 seats.