Answer: She has 525 costumers.
Explanation:
We know that the costumer base is
residential and
business. This means that:
residential customers
Let be "x" the total costumers Athy has and "y" the number of business costumers.
Then "x" must be:
![x=350+y](https://img.qammunity.org/2020/formulas/mathematics/middle-school/n4yt2x92z50sduz08hp8i25yovg51kru78.png)
Then, in order to find "y" , we need to multiply the number of residential costumers by
and divide the product by
:
![y=((350)((1)/(3)))/((2)/(3) )\\\\y=175](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ax7tcr2jzgddv0uxcbjh3zrq4wj8d59kxq.png)
Substituting we get that "x" is:
costumers