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Question Number 66356 by sandeepkeshari0797@gmail.com last updated on 13/Aug/19
Answered by $@ty@m123 last updated on 13/Aug/19
Letthenumber=10x+yATQ,9(10x+y)=2(10y+x)90x+9y=20y+2x88x=11y8x=y...(1)Also,x+y=9⇒x+8x=9⇒9x=9⇒x=1⇒y=8⇒Req.number=18
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