Cassandra works at a bookstore. Yesterday, she sold 18 hardcover books. The rest of the books she sold were paperback books. She sold a total of 41 books. How many paperback books did she sell? Use the variable p to represent the number of paperback books Cassandra sold yesterday.

Which equation represents this situation and its solution?

p + 18 = 41; p = 23

41p = 18; p = 23

p + 41 = 18; p = 23

18p = 41; p = 23

Help!!!

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