“Fill in the numbers 1, 2, 3, 4, 5 once each, to make the equation true: ?x?-?x?=-13”

-Park Math, Book 1, p10

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“Fill in the numbers 1, 2, 3, 4, 5 once each, to make the equation true: ?x?-?x?=-13”

-Park Math, Book 1, p10

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