Question

a two digit number is 4 times the sum of it's digits if we interchange the digits the number obtained is 9 less than 4 times the original number. Then find the number​

Answer 1

Answer:

12

Step-by-step explanation:

A two digit number is 4 times the sum of its digits if we interchange the digits the number obtained is 9 more than the original number. find the number.

Let the two digit number is xy

we know that we can write it as= 10x+y

Sum of digits= x+y

According to the question:

On interchanging the digits number can be written as 10y+x

if we interchange the digits the number obtained is 9 more than the orignal number

So

Solve eq1 and eq2

Thus the two digit number is 12.

Hope it helps :-)