To solve this problem, you simply need to divide 90 by 18, to find the number of paid months, then add the two free months.
So:
= 5 paid months
5 paid months + 2 free months = 7 months that you will be able to play
Hope this helped :)
So:
5 paid months + 2 free months = 7 months that you will be able to play
Hope this helped :)