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01-10-2020
Mathematics

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Sally's mom gave her $85 to buy books. She bought 9 books and had $13 left. How much did each book cost?

Respuesta :

01-10-2020

Answer:

each book cost $8

Step-by-step explanation:

85=9x+13

subtract 13 from both sides

72=9x

divide both sides by 9

8=x

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