Solutions by everydaycalculation.com
1240 - 740 is 18.
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Related: 24/40-7/40 12/40-14/40 12/80-7/40 12/40-7/80 36/40-7/40 12/40-21/40 60/40-7/40 12/40-35/40 84/40-7/40 12/40-49/40
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