Answer:
$5
Step-by-step explanation:
70-30=40 You started with 70 and ended with 30.
40/8=5 You spent $40 on 8 books. Each book was $5.00.
7.13 each
70 - 13 = 57. Divide 57/8 and get your answer
(7.125 rounded is 7.13)
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