Question 175412
Let's call the number we are looking for x.  Then three times the number would be 3x, and "25 added to three times the number" would be 3x+25.  Thus, we need to solve
{{{3x+25 = 52}}}
Subtract 25 from both sides
{{{3x = 27}}}
Divide both sides by 3
{{{x = 9}}}
Thus the magical number is 9.  You can check your answer logically.  If you multiply 9 by 3 (27) and add 25, you do indeed get 52.