Question

The sum of the digits of a two-digit number is 12. Units digit is two more than tens digit.
The number is
Select one:
a. 45
b. 75
c. 57
d. 72​

Answer 1

Answer:

Here, The required number is 75.

Step-by-step explanation:

Here, As per our given question,

Let the tens digit of the number be y

Let the ones digit of the number be x

Now,=x+y=12 -(1st)eq.

After that,=x-y=2 -(2nd)eq.

On solving both equations by elimination method, we will add both of them,

=x+y=12

=x-y=2

After solving, we get,

=x+x=12+2

=2x=14

=x=14/2

=x=7

Now, By putting value of x in eq. 1,we get,

=7+y=12

=y=12-7

=y=5

Here, As we get that the ones digit of the number is 7 and tens digit is 5,

So, The number =75.

Thank you.