Question

answer the question please.

Answer 1

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Answer 2

Let 2 digit Number be= XY = 10.X +1.Y

X+Y=15

Reversing the Digit. = YX = 10.Y + 1.X


It is Given
YX - XY =9
10Y +X -10X-Y=9
9Y- 9X= 9
Y-X =1



now we got two equations,,,


X+Y=15
Y-X=1

on solving

Y= 8
X=7

so original number is XY = 78