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Question
Using brackets, write three pairs of numbers whose sum is 13. Use them to write three equalities.
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Solution
(7 + 6), (8 + 5), (9 + 4).
since 7 + 6 = 13, 8 + 5 = 13, 9 + 4 = 13.
(7 + 6) = (8 + 5), (7 + 6) = (9 + 4) or (8 + 5) = (9 + 4).
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