Equal sets are sets containing the exact same elements.
Ex.
If A = {a, b, c, d} and B = {a, b, c, d} , then A and B are equal sets.
Another example is the set containing non-negative integers and the set containing whole numbers. These sets are equal since they contain similar elements, {0, 1, 2, 3, 4, 5, 6, 7, ...}
