Latoya bought some books for $4 each and received a discount of $5 off of her total purchase. She spent $71 after the discount. How many books did she buy?
(a) Write an equation that could be used to answer the question above. First, choose the appropriate form. Then, fill in the blanks with the numbers 4, 5, and 71. Let b represent the number of books.
(b) Solve the equation in part (a) to find the number of books.
(a) The equation that could be used to answer the question is:
4b - 5 = 71
(b) To solve the equation, we need to isolate the variable "b":
4b - 5 = 71
Add 5 to both sides:
4b = 76
Divide both sides by 4:
b = 19
Therefore, Latoya bought 19 books.