Question 31704
You need to isolate the variable.  To do this, you put all terms with x on one side of the equation, and you put all the terms without x on the other side.


{{{3x = x/2 + 10}}}


{{{3x - x/2 = 10}}}


Now, you need to solve for x.  In this case, you can factor it out, then divide both sides by the remaining constant:

{{{x(3 - 1/2) = 10}}}


{{{x(5/2) = 10}}}


{{{x = 4}}}