10. (10 points) Hongxing Primary School organized students to participate in a drill. At the beginning, only 40 boys participated. Later, the team was adjusted, each time reducing 3 boys and adding 2 girls. After $\qquad$ adjustments, the number of boys and girls became equal.
10. (10 points) Hongxing Primary School organized students to participate in a drill. At the beginning, only 40 boys participated. Later, the team was adjusted, each time reducing 3 boys and adding 2 girls. After 8 adjustments, the number of boys and girls was equal.
【Solution】Solution: $40 \div(3+2)$
$$
\begin{array}{l}
=40 \div 5 \\
=8 \text { (times) }
\end{array}
$$

Answer: After 8 adjustments, the number of boys and girls was equal.
Therefore, the answer is: 8.