SOLUTION: The sum of two numbers is 63, the difference is 21. What are the two numbers?

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Question 892658: The sum of two numbers is 63, the difference is 21. What are the two numbers?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A%2BB=63
A-B=21
Add the equations together,
A%2BB%2BA-B=63%2B21
2A=84
highlight%28A=42%29
Then,
42-B=21
highlight%28B=21%29