Equality is a principle of justice, which stipulates that different entities / people should receive equal treatment, equal resources, equal rights etc.
In contrast, equity is a principle of justice, which stipulates that different entities / people should receive different benefits to the effect that they have the same changes and opportunities.
These different principles are well illustrated in figure 1

Figure1: Equality (left) versus equity (right). Source: https://miro.medium.com/max/484/1*w2Y8CF80LNEmkMMWRc8xlA.png