To determine the number of balloons Alexa popped, we can set up the equation based on the information given.
Krista popped 5 balloons, and together Krista and Alexa popped a total of 13 balloons. We can express the situation with the following equation:
\[ 5 + n = 13 \]
where \( n \) is the number of balloons Alexa popped.
To find \( n \), we can solve the equation:
\[ n = 13 - 5 \] \[ n = 8 \]
Therefore, Alexa popped 8 balloons.
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