Question

In a two digit number the units digit is twice the tens digitand the difference between the number and the number formed by reversing the digits is 18 find the original n​

Answer 1

Answer:

Thus, the ratio of unit digit to the ten's digit in the original number is 2 : 1.

Answer 2

Answer:

Number= -24

Step-by-step explanation:

10x+y=10x+2x            => 10x+y=12x      => y=12x-10x        => y=2x

10x+y-(10y+x)=18

10x+2x-(20x+x)=18

12x-21x=18

-9x=18

x=18/-9

x=-2

y=2x=-4

So, number= 10x+y=10*(-2)+(-4)=-20+(-4)=-20-4=-24

Let us check- y=2x (true)

-24-(-42)=-24+42=18 (true)

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