Let's denote the number of shirts in each box as \( x \). Since Zoey had 2 boxes, the total number of shirts initially is:
\[ 2x \]
After selling 6 shirts, she had 14 shirts left. Therefore, we can write the equation:
\[ 2x - 6 = 14 \]
Now, we'll solve this equation for \( x \):
- Add 6 to both sides:
\[ 2x = 14 + 6 \] \[ 2x = 20 \]
- Divide both sides by 2:
\[ x = \frac{20}{2} \] \[ x = 10 \]
Thus, there were 10 shirts in each box initially.
The correct answer is:
10