Solve 2-3cos x=5+3cox x for 0 degree < = x < = 180 degree

You have the following expression given in the problem above: 2-3co x=5+3cosx. To solve it, you must apply the proccedure shown below:
 You have:
 2-3cosx=5+3cosx
 Solve for cosx:
 -3cosx-3cosx=5-2
 -6cosx=3
 cosx=3/-6
 cosx=-1/2
 x=120°

 The answer is: 120°