SOLUTION: Write the system of equations as an augmented matrix. Then solve for x and y. 5x-4y=12 -5x+3y=9

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: Write the system of equations as an augmented matrix. Then solve for x and y. 5x-4y=12 -5x+3y=9      Log On


   

Question 1058482: Write the system of equations as an augmented matrix. Then solve for x and y.
5x-4y=12
-5x+3y=9
Found 2 solutions by Fombitz, Alan3354:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
%28matrix%282%2C3%2C5%2C-4%2C12%2C-5%2C3%2C9%29%29
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I made a table in EXCEL (with row operation explanations in the first column),
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x=-72%2F5
y=-21

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
5x-4y=12
-5x+3y=9
------------- Add
-y = 21
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Not a good example for using a matrix.