You need to use the order of operations to solve this, which is PEDMAS; however, there is no real order of if division should come before multiplication or vice versa, so you do it in the order it appears in the problem. This is true for addition and subtraction as well.
The second equation because they all have a common factor of 3. You can get x by itself. However, with the first one, you'll end up with fractions instead.
