A group of 72 people travel to the beach for a clean-up day. Some of the people bring their own supplies. Write an equation for the number of people for whom supplies will be provided p, if b people bring their own supplies?

p=72-b

Step-by-step explanation:

From the statement, you can say that the number of people whom supplies will be provided would be equal to the number of people that travel to the beach minus the amount of people that bring their own supplies:

p=72-b, where:

p = number of people for whom supplies will be provided

b = number of people that bring their own supplies