Question 1017565
Here, 
The sum of the two digits is 12. 

Let,
 The unit digit is x
 The tens digit is (12-x)

So, the number is = 10*(12-x) + x

The value of the number is  6x

According to the question,

10*(12-x) + x = 6x
=> 120 - 10x + x = 6x
=> 120 - 9x = 6x
=> 120 = 6x + 9x 
=> 15x = 120 
=> x = {{{120/15}}}
=> x = 8

The unit digit is 8 
The  tens digit is (12 - 8) or 4

Thus, the number is (10*4 + 8 )or 48