If Celia played several rounds of a video game, the points she scores can be calculated by finding the product of the number of rounds she played and the point she scored per round.
If she scores x points and she plays r number of rounds, her total points, T, can be calculated to be:
[tex]T=x\times r[/tex]From the question, Celia scores -60 points. She lost 5 points per round. This means that we have the following parameters from the question:
[tex]\begin{gathered} T=-60 \\ x=-5\text{ (because she loses 5 points)} \end{gathered}[/tex]Therefore, if we put these values into our formula, we can therefore solve for the number of rounds as shown below:
[tex]\begin{gathered} -60=-5\times r \\ \text{Dividing both sides by -5, we have:} \\ r=\frac{-60}{-5} \\ r=12 \end{gathered}[/tex]The number of rounds Celia played is 12 rounds.