Solutions by everydaycalculation.com
515 - 35 is -415.
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Related: 10/15-3/5 5/15-6/5 5/30-3/5 5/15-3/10 5/15-9/5 5/45-3/5 5/15-3/15 25/15-3/5 5/15-15/5 5/75-3/5 5/15-3/25 35/15-3/5 5/15-21/5 5/15-3/35
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