Solutions by everydaycalculation.com
1418 - 1218 is 19.
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Related: 28/18-12/18 14/18-24/18 14/36-12/18 14/18-12/36 42/18-12/18 14/18-36/18 14/54-12/18 14/18-12/54 70/18-12/18 14/18-60/18 14/90-12/18 14/18-12/90 98/18-12/18 14/18-84/18
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