What should be added to -3upon 5 to get 8upon 15
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let that no be X
-3/5 +X = 8/15
X= 8/15 + 3/5
X= 8/15 +9/15
X= 17/15
therefore, 17/15 should be added
-3/5 +X = 8/15
X= 8/15 + 3/5
X= 8/15 +9/15
X= 17/15
therefore, 17/15 should be added
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