Question

A 2 digit number is 7 times the sum of its digit the number formed by reversing the digit is 18 less than given number find the number

Answer 1

Answer =42

Step-by-step explanation:

let the number be 10x+ y

given that

10x+y = 7(x+y)

10x+y=7x+7y

3x=6y

x=2y

Now,

on reversing the number we get 10y+x which is 18 times less than 10x+y

10y+x = (10x +y )-18

substitute x value here

10y+2y = [10(2y)+y]-18

12y = 21y - 18

9y = 18

y=2

x=2y

x= 4

10x+y=42