SOLUTION: SOLVE THE SYSTEM USING THE GAUSS-JORDAN METHOD PROBLEM: x+3y= 6 -4x-9y= 3 CAN YOU SHOW ME THE CORRECT STEPS TO SOLVE THIS PROBLEM... I KNOW THE FORMULA HAS TO BE 1 0..

Question 136195: SOLVE THE SYSTEM USING THE GAUSS-JORDAN METHOD

PROBLEM: x+3y= 6
-4x-9y= 3
CAN YOU SHOW ME THE CORRECT STEPS TO SOLVE THIS PROBLEM... I KNOW THE FORMULA HAS TO BE 1 0..
0 1..
AND I ALSO KNOW HOW TO FIRST SET IT UP...
1 3..6
-4 -9..3 THANK YOU FOR TAKING TIME OUT OF YOUR DAY TO HELP ME :)
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
.1..3..6
-4 -9..3
------------
Add 4 times the 1st row to the 2nd row to get:
.1..3..6
.0 3..27
-------------
Divide thru the 2nd equation by 3 to get:

.1..3..6
.0 1..9
---------
Add -3 times the 2nd row to the 1st row to get:
.1..0..-21
.0 1..9
===================
Cheers,
Stan H.

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