Question

A number consists of two digits . The digit at tens place is twice that of the digit at units place.18 is subtracted grom the the nunmber ,the digits are reversed. Find the number please show the method also

Answer 1

let the once place be x
tens place 2x
x + 2x -18 = 81
3x -18 = 81
3x=81+18
3x=99
x=99÷3
x=33
tens place 2x = 2×33
hope it helps
please mark it as brainiest answer

Answer 2

Answer : 42.


Explanation -

let the number of units place = x

Given : The digit at tens place twice of units place

Tens digit place = 2x (10) + 1 = 20x + 1 = 21x

Interchange the digits - 12x

Given : if 18 is subtracted from the number, the digits are reversed

According to the given question-

21x - 18 = 12x

21x - 12x = 18

9x = 18

x = 2.

The original number = 21 x = 21(2) = 42. 


Hence : 

Answer : 42.