Mia bought 10 boxes of brownies at the store for a total of $64. The tax on the purchase was $5. What was the cost of each box?

Which equation represents this scenario?

a. 10r + 5 + 64

b. 5(10r) = 64

c. 10r - 64 = 5

d. 5 - 10r = 64

Let r represent cost of each box.

We have been given that Mia bought 10 boxes of brownies. So cost of 10 boxes would be .

We have been given that Mia bought 10 boxes of brownies at the store for a total of $64. The tax on the purchase was $5. So the total cost of 10 boxes would be cost of 10 boxes plus tax.

We can represent this information in an equation as:

We can subtract 64 from both sides as:

Therefore, our required equation is and option 'c' is the correct choice.