<h2>
Answer:</h2>
Step 1: 17 - 9 = 8
Step 2: 8 + 4 = 12
4 more girls came to the park
Hope this helps!!
<h2>- Carmelle -</h2>
Hope this helps :) If you have a doubt just comment :)
The answer is 3 because it goes into 39 and 42 and 6 doesn't go into 39