Answer: 21 and -15
Explanation:
Let the two numbers be x and y.
Set up the two equations:
x + y = 6
x - y = 36
Add the two equations:
2x = 42
x = 21.
Plug the value of x back in to the first equation:
21 + y = 6
y = -15
Therefore, the two numbers are 21 and -15