Answer:
4 people were attending the banquet
Step-by-step explanation:
1 - Rewrite
b = 75 + 15n; b = 130
2 - Plug in and get n alone
130 = 75 + 15n
- 75 -75
55 = 15n ←↓ Divide both sides by 15
55/15 = n
4 [tex]3.6666... = n \\\4 = n[/tex]
Hope this helps