Question

aurora has a cell phone plan that charges $65 for phone service plus $12 for each gigabyte of data used each month. if her bill for september is $113, how many gigabytes of data did she use in september? enter your answer as a number, like this: 42

Explanation:

Step1: Subtract base - service cost

Let $x$ be the number of gigabytes of data used. The total bill equation is $113 = 65+12x$. First, subtract the base - service cost from the total bill: $113 - 65=12x$. So, $48 = 12x$.

Step2: Solve for $x$

Divide both sides of the equation $48 = 12x$ by 12. $\frac{48}{12}=x$.

Answer:

4