Let’s create an equation; we are given a rate of $4 per attendee:
4a=52, where a=number of attendees
Solve for a:
Divide both sides by 4:
a=52/4
a=13
So, there can only be 13 attendees at the picnic to remain within budget. Let’s check our answer:
4(13)=52
52=52
So, 13 attendees is correct