A student bought a book for $7 and a pen. The total cost was $9. Which of the following equations can be used to find the cost of the pen?

asked Mar 7, 2022 235k views

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2 votes

Answer: D

Explanation:

$7 = cost of book

(p) = cost of pen as a variable

add them together, for total price: $9

7+p=9

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