Answer:
40+ 2m=100
Explanation:
Let's represent the number of movies needed to watch by 'm' .
You get 2 points by watching one movie. You will receive 2 times m points by watching m number of movies.
You already have 40 points
40 plus 2m should be equal to 100 points so that you can earn a free pass.
So the equation should be 40+ 2m=100