If the sum of two numbers is 6 and there difference is -2 what are the two numbers?

Let numbers be x and y. Then,

x + y = 6

x - y = -2 add up both equations

2x + y - y = 6 + (-2)

2x = 4 divide by 2 to both sides

x = 2

Since the sum of the numbers is 6 and one of the numbers is 2, then the other number is 4 (6 - 2).

Check:

2 + 4 = 6

2 - 4 = -2