If 5x&nbsp;- 3y&nbsp;= 13438 and 5x-1&nbsp;+ 3y+1&nbsp;= 9686 , then x+y equals

If 5^x - 3^y = 13438 and 5^x-1 + 3^y+1 = 9686 , then x+y equals

Started 7 months ago by Shashank in

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