SOLUTION: x+y=15 x-y=-3 what is the solution? is it consistent or inconsistent? dependent or independent?

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Question 330006: x+y=15
x-y=-3
what is the solution?
is it consistent or inconsistent?
dependent or independent?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Add the equations together.
x%2By%2Bx-y=15-3
2x=12
x=6
Then use either equation to solve for x.
6%2By=15
y=-9
One solution means a consistent independent system.