SOLUTION: solve each system by using an augmented matrix.
x-2y+z=9
3x+y=1
-2x-3y-z=0
Algebra.Com
Question 666357: solve each system by using an augmented matrix.
x-2y+z=9
3x+y=1
-2x-3y-z=0
Answer by swincher4391(1107) (Show Source): You can put this solution on YOUR website!
Add -3 times the 1st row to the 2nd row to get:
Add 2 times the 1st row to the 3rd row to get:
Divide the 2nd row by 7.
Add 7 times the 2nd row to the third row.
Divide by -2 to the third row.
Add 3/7 times the 3rd row to the 2nd row
Add -1 times the 3rd row to the 1st row
Add 2 times the 2nd row to the 1st row
x = 5/14, y = -1/14, z = -1/2
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