after tennis training, andy collects twice as many balls as roger and five more than maria. Hoiw many balls did andy collect?

Question

maths 

Answer 1

Hello Eviestar,

I believe the best way to break down this problem is by using algebra and variables.

By reading the question, we know that we have 3 people:

1. Andy
2. Roger
3. Maria

Let's assign them to variables based on the first letter of their name, thus:

1. Let Andy = a
2. Let Roger = r
3. And let Maria = m

The first part is that Andy collected twice as many balls as roger. "Twice" can be described as "Multiply By 2". So, we can write:

1. a = 2r

You can read this as however many balls Roger has, Andy will have twice as much.

Next part is that Andy has 5 more balls than Maria. Thus:

1. a = m + 5

We don't know how many balls either Roger or Mary has, but we can compare them since we know that Andy has a certain amount. We can set the two equations above to equal:

1. 2r = m + 5

If you can find out how many balls either Roger or Mary has, you can plug that in to the above equation and go from there