The tens digit of a two digit number is twice of its unit digit on reversing the digits the number formed is 20 less than the original number find the original number
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Step-by-step explanation:
Let unit digit be X
Ten digit =2x
The number=10(2x)+x
=20x+x
=21x
The number formed by reversing the digit of the number=10x+2x
=12x
=21x+20=12x
=21x-12x=-20
=9x=-20
x=-20/9
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