Solutions by everydaycalculation.com
78 - 512 is 1124.
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Related: 14/8-5/12 7/8-10/12 7/16-5/12 7/8-5/24 21/8-5/12 7/8-15/12 7/24-5/12 7/8-5/36 35/8-5/12 7/8-25/12 7/40-5/12 7/8-5/60 49/8-5/12 7/8-35/12 7/56-5/12 7/8-5/84
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