Question 108090
AN AUGMENTED MATRIX IS A STANDARD MATRIX WITH THE NUMERIC VALUES ADDED THUS
5,2
3-1
BECOMES:
5,2,2
3,-1,-12 NOW MULTIPLY THE SECOND ENTRY BY 2 & ADD THE 2 ROWS

5,2,2
6,-2,-24
----------------
11,0,-22 OR 
11X=-22 
X=-22/11
X=-2 ANSWER.
5*-2+2Y=2
-10+2Y=2
2Y=2+10
2Y=12 
Y=12/2
Y=6 ANSWER.
PROOF
3*-2-6=-12
-6-6=-12
-12=-12