Answer:
She earns 5.5 dollars per hour at the library
Explanation:
I am going to assume that the questions is "how much she earns per hour at the library?"
Let's call x the amount of dollars earn by hour at the library. We know that she worked for 6 hours, thus she made 6x dollars.
Later her grandma gave her 20 dollars and she has now 53 dollars.
Let's write the equation and solve it
Amount earned + Amount given by her grandma = 53
![6x+20=53\\6x=33\\x=(33)/(6)\\x=5.5](https://img.qammunity.org/2021/formulas/mathematics/high-school/jfkrmt17j0127j7awu0b2yvbba8vwve1ob.png)
Thus, based on this information we would have that Kia earns 5.5 dollars per hour.