A vibrant scene at a school fair. In the foreground, a Middle-Eastern girl named Krista is seen throwing a dart at a wall filled with colorful balloons. She has a proud smile on her face as 5 deflated balloons lie at her feet. Close by, a South Asian girl named Alexa is mid-throw, aiming cleverly at the abundant, un-popped colorful balloons. On the ground near Alexa, there's an ambiguous number of deflated balloons. A lot of balloons hanging on the wall - a count clearly totaling more than 13 - adds to the jovial ambiance.

Krista and Alexa played balloon darts in a school fair. Krista popped 5 balloons and Alexa popped n balloons. Together, they popped a total of 13 balloons, Which equation can be used to determine the number of balloons Alexa popped? How many balloons did she pop?

The equation that can be used to determine the number of balloons Alexa popped is 5 + n = 13.

To find out how many balloons Alexa popped, we can subtract 5 from both sides of the equation: n = 13 - 5 = <<13-5=8>>8.
Alexa popped 8 balloons. Answer: \boxed{8}.

Let's suppose the number of balloons Alexa popped is represented by the variable "n". According to the problem, Krista popped 5 balloons and together they popped a total of 13 balloons. We can represent this situation with the equation:

5 + n = 13

To find the value of "n", we can solve the equation:

n = 13 - 5
n = 8

Therefore, Alexa popped 8 balloons.

To determine the number of balloons Alexa popped, we can set up an equation based on the given information. Let's define the number of balloons Krista popped as "5" and the number of balloons Alexa popped as "n".

According to the problem, together they popped a total of 13 balloons. So, we can write the equation as:

5 + n = 13

To find the value of "n" (the number of balloons Alexa popped), we need to solve this equation.

To isolate "n" on one side of the equation, we can subtract "5" from both sides:

n = 13 - 5

Simplifying the right side:

n = 8

Therefore, Alexa popped 8 balloons.