Solutions by everydaycalculation.com
69 - 39 is 13.
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Related: 12/9-3/9 6/9-6/9 6/18-3/9 6/9-3/18 18/9-3/9 6/27-3/9 6/9-3/27 30/9-3/9 6/9-15/9 6/45-3/9 6/9-3/45 42/9-3/9 6/9-21/9 6/63-3/9 6/9-3/63
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