Solutions by everydaycalculation.com
742 - 142 is 17.
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Related: 14/42-1/42 7/42-2/42 7/84-1/42 7/42-1/84 21/42-1/42 7/42-3/42 35/42-1/42 7/42-5/42 49/42-1/42 7/42-7/42
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