Question

7 times a two digit number is equal to 4 times the number obtained by reversing the digit if the difference between the digit=3 find the number​

Answer 1

let 2 digit number be xy

it can be written as 10x+y

[x is ten place ,y is uni place]

given,

7(10x+y)=4(10y+x)

70x+7y=40y+4x

66x=33y

x=y/2------------(1)

given, y-x=3----------(2)

from (1)&(2), y=6 x=3

hence digit is 36