Solutions by everydaycalculation.com
1028 - 1428 is -17.
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Related: 20/28-14/28 10/56-14/28 10/28-14/56 30/28-14/28 10/28-42/28 10/84-14/28 10/28-14/84 50/28-14/28 10/28-70/28 70/28-14/28 10/28-98/28
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