Solutions by everydaycalculation.com
1520 - 1020 is 14.
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Related: 30/20-10/20 15/40-10/20 15/20-10/40 45/20-10/20 15/20-30/20 15/60-10/20 15/20-10/60 75/20-10/20 15/20-50/20 15/20-70/20
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