SOLUTION: use an augmented matrix to solve each system of equations
-x+y=9
-4x+y=6
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Question 743576: use an augmented matrix to solve each system of equations
-x+y=9
-4x+y=6
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
use an augmented matrix to solve each system of equations
-x+y=9
-4x+y=6
-------------
|-1 +1 -9|
|-4 +1 -6|
-----------------
Det = -1 - (-4) = 3
-----
x*Det = -6 - (-9) = 3
x = 3/Det
x = 1
-----------
-y/Det = 6 - 36 = -30
y = 10
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