An equitable right means that something is fair or just. It's like when you and your friend are sharing a toy and you both get to play with it for the same amount of time. That's fair and equitable.
In some grown-up situations, people might use the term "equitable right" to talk about something that's fair for everyone involved. For example, if two people own a house together and one of them wants to sell it, the other person might have an equitable right to be involved in the decision. This is because it's not just fair for one person to make a big decision without including the other person who also owns the house.
So when people talk about equitable rights, they're really talking about fairness and making sure everyone is considered in important decisions.