Question

a number has two digits . The unit digit is four times than tens digits . if the difference between the number obtained by reversing the digits and the original number is 54, find the original number
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Answer 1

Answer:

Number=x+10y

x=4y

y+10x-x-10y=54

9x-9y=54

x-y=6

4y-y=6

3y=6

y=2

x=8

The number=28

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