Ineed someone to show me how to do this

The answer is: 225 hamburgers were sold on Friday.

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

Where:

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

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

Substituting B into the first equation, we have:

So, 225 hamburgers were sold on Friday.

Also, we can calculate how many cheeseburgers were sold:

So, 162 cheeseburgers were sold on Friday!

Have a nice day!

here's a poem i finished a while ago. i hope you like it and that it inspires you.