SOLUTION: identify inconsistent systems and systems with dependent equations, using set notation to express solution sets. 4(x-y)=-12 4(x+y)=-20

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Question 153926: identify inconsistent systems and systems with dependent equations, using set notation to express solution sets.
4(x-y)=-12
4(x+y)=-20
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.4%28x-y%29=-12
2.4%28x%2By%29=-20
Divide both sides of both equations by 4.
1.x-y=-3
2.x%2By=-5
Now add the two equations together, to cancel out y, and solve for x.
1.%28x-y%29%2B%28x%2By%29=-3-5
2x=-8
x=-4
Using eq. 2,
x%2By=-5
-4%2By=-5
y=-1
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.
.
(x,y)=(-4,-1)