SOLUTION: solve for x if [3 1 0 2 x 1 4 5 -2] = 0

Question 1113773: solve for x if [3 1 0
2 x 1
4 5 -2] = 0
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
solve for x if [3 1 0
2 x 1
4 5 -2] = 0
--------------------------


|3   1   0|
|2   x   1| = 0
|4   5  -2|
===============
|2   x   1|
|3   1   0| = 0
|4   5  -2|
=================
|x   2   1|
|1   3   0| = 0
|5   4  -2|
---------

x*(-6-0) - 2*(-1-0) + 1*(4-15) = 0
-6x + 2 - 11 = 0
-6x = 9
x = -3/2
------------------------
the transposing is not necessary, but it gives just one term with x.

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