Reuben ordered some books online and spent a total of $75. Each book cost $6 and he paid a total of $3 for shipping. How many books-did he 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 75, 6, and 3. Let b represent the number of books.
ob +0=0
06-0-0
(b) Solve the equation in part (a) to find the number of books.
b=0