SOLUTION: Write the system of equations as an augmented matrix. Then solve for x and y. x+2y=1 3x-y=-11 Solution =

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Question 1061766: Write the system of equations as an augmented matrix. Then solve for x and y.

x+2y=1
3x-y=-11
Solution =

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
%28matrix%282%2C3%2C%0D%0A1%2C2%2C1%2C%0D%0A3%2C-1%2C-11%29%29
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Replace R%5B1%5D with R%5B1%5D%2B2%2AR%5B2%5D
%28matrix%282%2C3%2C%0D%0A7%2C0%2C-21%2C%0D%0A3%2C-1%2C-11%29%29
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Divide R%5B1%5D by 7,
%28matrix%282%2C3%2C%0D%0A1%2C0%2C-3%2C%0D%0A3%2C-1%2C-11%29%29
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Replace R%5B2%5D with 3R%5B1%5D-R%5B2%5D,
%28matrix%282%2C3%2C%0D%0A1%2C0%2C-3%2C%0D%0A0%2C1%2C2%29%29
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x=-3
y=2