यदि a/b एक भिन्न है, जहाँ a=b-3 तथा a+10/b - a/b = 10/7 है, तो a/b का मान क्या है

यदि a/b एक भिन्न है, जहाँ a=b-3 तथा a+10/b - a/b = 10/7 है, तो a/b का मान क्या है
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