Solutions by everydaycalculation.com
49 - 59 is -19.
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Related: 8/9-5/9 4/9-10/9 4/18-5/9 4/9-5/18 12/9-5/9 4/9-15/9 4/27-5/9 4/9-5/27 20/9-5/9 4/9-25/9 4/45-5/9 4/9-5/45 28/9-5/9 4/9-35/9 4/63-5/9 4/9-5/63
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