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3 October, 19:26

Sam read 5 books this week and some books last week. If Sam read 12 books in all, how many books (b) did Sam read last week?

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  1. 3 October, 23:00
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    12 minus 5 which is 7 so 7 books
  2. 3 October, 23:19
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    5 books + x = 12 books

    Subtract 5 from both sides to solve for x, which is representing the number of books Sam read last week.

    5 - 5 + x = 12 - 5

    x = 12 - 5

    x = 7
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