NEED HELP ASAP! PLEASE

As a social media influencer on YIKES, you earn 5 points for every “like” of a post, and you lose 2 points for every “dislike” of a post. If you need to earn at least 500 points everyday to get paid, write and then graph the inequality that shows all combinations of “likes” and “dislikes” you can have, and still get paid.

(I just need help on the equation)
Here’s why I got (on the top)
Please correct me if I’m wrong, and also if you could write how I could explain how I got the equation.