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Two friends count the number of board games, video games, and puzzles that are in their closets.Which matrix represents the total number of board games, video games, and puzzles that the two friends have
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Two friends count the number of board games, video games, and puzzles that are in their closets.Which matrix represents the total number of board games, video games, and puzzles that the two friends have together?

Two friends count the number of board games, video games, and puzzles that are in-example-1
User Virusrocks
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1) Since the matrix must relate the total number of board games, that they both have, then we can write:

2) Considering each row as the sum of both friends' games we can state:

Two friends count the number of board games, video games, and puzzles that are in-example-1
User Totaltotals
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