Answer:
I got the number of girls to be g= (b-3)/4.
Step-by-step explanation:
1. Three more than something means you are adding 3 to something.
2. Four times the number of girls (g) means 4g
3. Putting everything into an equation you get: b= 3+4g
4. Solve for g girls, you get g= (b-3)/4
Hope this helps!