Question

I need someone to show me how to do this please

Answer 1

Hello!

The answer is: 225 hamburgers were sold on Friday.

Why?

Let's make the equations that we need to solve the problem:

Where:

`A=Hamburgers\\B=Cheeseburgers`

So, if there is a combined total of 387 hamburgers and cheeseburgers,

`A+B=387`

Also, we know that there were 63 fewer cheeseburgers sold than hamburgers, so:

`B=A-63`

Substituting B into the first equation, we have:

`A+A-63=387`

`2A=387+63`

`2A=450`

`A=(450)/(2)=225`

So, 225 hamburgers were sold on Friday.

Also, we can calculate how many cheeseburgers were sold:

`B=225-63=162`

So, 162 cheeseburgers were sold on Friday!

Have a nice day!