Question

in 2 digit number. The unit digit is thrice the ten's digit . if 36 is added to the number . the digit interchange their place . find the no.​

Answer 1

Answer:

26

Step-by-step explanation:

Let the tens digit be x

Unit digit is thrice the tens digit = Thrice of x = 3x

Tens digit is equivalent to 10 unit digits = x * 10 = 10x

Original number = 10x + 3x

For interchanged number

Unit digit = x (Tens digit is exchanged)

Tens digit = 3x(Unit digit is exchanged)

Since tens digit is equivalent to 10 unit digits = 3x *10 = 30x

Interchanged digits  = 30x + x

10x + 3x + 36 = 30x + x

13x + 36 = 31x

18x = 36

x = 2

Original number = 10x + 3x

                           = 10 * 2 + 3 * 2

                           = 20 + 6

                           = 26