Question

4. The sum of the digits of a 2 digit number is 12. The digit at one's place is 3 times the digit at tens place. Find the number.​

Answer 1

Let the digit at the tens place to be x

the digit at once place is 3x

Their sum is 12

x + 3x = 12

4x = 12

x = 12/4

x = 3

The digit at once place = 3x = 3(3) = 9

Therefore the two digit number is 39

PLEASE MARK AS BRAINLIEST

Answer 2

Step-by-step explanation:

1. X+Y=12

2.X=3Y= X/y=3

3.Y=12-X

4. X = 3

Y

5. _X_ = 3

12-X

6. X= 36-3x

7. 4x=36

8. X=9

9. For Y

10. Y=12-9

11. Y=3

12. X+Y=12

13. 9+3=12

14. X =3

Y

15. 9 = 3

3

16. 3=3

17. Hence proved