Emma M. answered 09/15/20
Emma Math and Science tutor
Hello Meg!
Let's first think about how much they are going to spend.
They are going to spend 640 dollars.
They are both going to spend 200 dollars on surfboards.
That means you have to multiply 200 times 2 which is 400.
Lets start an equation with that.
640= 400
If lessons are 20 dollars per person we need to multiply it by 2 as well.
So lets add that to our equation.
640= 400+ 40x
The x stands for the amount of lessons.
Let's solve now
640= 400+ 40x
-400 -400
240= 40x
240/40 40x/40
6=x
So they can take a maximum of 6 lessons.
I hope this helps you!