Solutions by everydaycalculation.com
1242 - 742 is 542.
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Related: 24/42-7/42 12/42-14/42 12/84-7/42 12/42-7/84 36/42-7/42 12/42-21/42 60/42-7/42 12/42-35/42 84/42-7/42 12/42-49/42
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