Solutions by everydaycalculation.com
16 - 1215 is -1930.
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Related: 2/6-12/15 1/6-24/15 1/12-12/15 1/6-12/30 3/6-12/15 1/6-36/15 1/18-12/15 1/6-12/45 5/6-12/15 1/6-60/15 1/30-12/15 1/6-12/75 7/6-12/15 1/6-84/15 1/42-12/15
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