Question 823700
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Hi, there--

3x -y + z = 4
x + 2y + 3z = 10
3x + 2y -z = -12

The augmented matrix for this system is

{{{(matrix(3,4,3,-1,1,4,1,2,3,10,3,2,-1,-12))}}}

Here is a very helpful site for showing the row operations to solve a matrix. The calculator will solve the matrix and show you all the steps, or it will let you practice by choosing each row operation yourself. (Great learning tool!)
http://www.math.odu.edu/~bogacki/cgi-bin/lat.cgi?c=roc

The correct answer is C. (-1, -2, 5).

Good luck!
Mrs. Figgy
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