Question 212430
The sum of the digits of a two-digit number is 4. The ones digit is three times the tens digit. The difference between the digits is two. What is the number?


Step 1.  Let 3x = ones digit


Step 2.  Let x = tens digit


Step 3.  Sum of digits is 4.


{{{3x+x=4}}} 


{{{x=1}}}


{{{3x=3}}}


Step 4.  Now, check if difference is two.


{{{3-1=2}}}  checks out.


Step 5.  ANSWER.  The number is 13.



Hope the steps were helpful.  Good luck in your studies.   
Respectfully, 
Dr J


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