Solutions by everydaycalculation.com
49 - 39 is 19.
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Related: 8/9-3/9 4/9-6/9 4/18-3/9 4/9-3/18 12/9-3/9 4/27-3/9 4/9-3/27 20/9-3/9 4/9-15/9 4/45-3/9 4/9-3/45 28/9-3/9 4/9-21/9 4/63-3/9 4/9-3/63
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