Question
A book rental shop rented out books and the rate of rental charges are shown in the table.

Number of days Rates
After the first 7 days 20 cents a day
After 7 days 40 cents a day

Seth rented 2 books and was charged $6.80. How many days did he rent the books for?
2 m

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A book rental shop rented out books and the rate of rental charges are shown in the table.

Number of days Rates
After the first 7 days 20 cents a day
After 7 days 40 cents a day

Seth rented 2 books and was charged $6.80. How many days did he rent the books for?