SOLUTION: solve the system using Gauss- Jordan elimination -6x1 - 3x2 = 21 2x1 + x2 =7

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Question 466168: solve the system using Gauss- Jordan elimination
-6x1 - 3x2 = 21
2x1 + x2 =7
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
%28matrix%282%2C3%2C+-6%2C-3%2C21%2C2%2C1%2C7%29%29
~ %28matrix%282%2C3%2C+2%2C1%2C7%2C-6%2C-3%2C21%29%29, R1 <-> R2.
~%28matrix%282%2C3%2C+2%2C1%2C7%2C0%2C0%2C42%29%29,after 3R1 + R2
~%28matrix%282%2C3%2C+1%2C1%2F2%2C7%2F2%2C0%2C0%2C1%29%29, after R1/2 and R2/42
~%28matrix%282%2C3%2C+1%2C1%2F2%2C0%2C0%2C0%2C1%29%29, after -7R2/2 + R1
The matrix is in reduced row echelon form. The last row says that the system is inconsistent, and there is no solution set.