SOLUTION: Twice one number plus a second number is 42, and the first number minus the second number is -6. Find the numbers.

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Question 374903: Twice one number plus a second number is 42, and the first number minus the second number is -6. Find the numbers.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.2A%2BB=42
2.A-B=-6
Add the equations together,
2A%2BB%2BA-B=42-6
3A=36
highlight%28A=12%29
Then from eq. 2,
12-B=-6
highlight%28B=18%29