Question 634553
Let x=smaller number
And let y=larger number
Now we are told that:
x+y=3x or
y=2x-------------------eq1
and
y-x=x or
y=2x-------------------eq2

This system of equations is consistent and dependent which means there is an infinite number of solutions. You can check this out by choosing a number for x then solve for y and see if the two numbers work. 

Hope this helps---ptaylor