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December 19, 2014

December 19, 2014

Posted by **Michael** on Monday, November 7, 2011 at 7:12pm.

3a+b+2c=3

4a+2b-c=-3

- Algebra -
**Steve**, Tuesday, November 8, 2011 at 5:20amD =

|1 1 5|

|3 1 2|

|4 2 -1| = 16

Dx =

|2 1 5|

|3 1 2|

|-3 2 -1| = 32

Dy =

|1 2 5|

|3 3 2|

|4 -3 -1| = -80

Dz =

|1 1 2|

|3 1 3|

|4 2 -3| = 16

So, the solution

(x,y,z) = (Dx/D, Dy/D, Dz/D) = (2,-5,1)

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