SOLUTION: use an augmented matrix to solve each system of equations 2y=10 6x+y=-7

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Question 743581: use an augmented matrix to solve each system of equations
2y=10
6x+y=-7
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!

2y=10
6x+y=-7
----------
0x +2y=10
6x + y=-7
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Do it like this one.
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use an augmented matrix to solve each system of equations
-x+y=9
-4x+y=6
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|-1 +1 -9|
|-4 +1 -6|
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Det = -1 - (-4) = 3
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x*Det = -6 - (-9) = 3
x = 3/Det
x = 1
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-y/Det = 6 - 36 = -30
y = 10