12 action films are shown. This is because if the ratio is 1:2, that means that exactly half of the total amount of movies are action. Thus, to evaluate this problem, you would find half of 24.
Because of rules of geometry we know that a+b=180 degrees so we can add the equations together and set that equal to 180 and solve 6x-48+4x+38=180 subtract 38 from both sides and add 48 to both sides then add like terms 10x=170 and divide by 10 to get x=17