Solutions by everydaycalculation.com
69 - 59 is 19.
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Related: 12/9-5/9 6/9-10/9 6/18-5/9 6/9-5/18 18/9-5/9 6/9-15/9 6/27-5/9 6/9-5/27 30/9-5/9 6/9-25/9 6/45-5/9 6/9-5/45 42/9-5/9 6/9-35/9 6/63-5/9 6/9-5/63
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