Answer- 21
-6+-9
—
-3
-6+27=21
27 = forty five to the secmventh
Answer:
9
Step-by-step explanation:
Total initially in bookstore = 45
Sold 13copies, remaining copies = 45-13= 32
Sold 23 copies again, remaining copies = 32-23 = 9
Copies left = 9
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