Solving Systems of Equations: Finding General Solutions with Augmented Matrices

[SMA_01]

Homework Statement

The question says to find the general solutions of the systems, given the augmented matrices:

1 3 4 l 7
3 9 7 l 6

Homework Equations

The Attempt at a Solution

1 3 4 l 7
3 9 7 l 6 --> (-3)1st+2nd and simplified

and got:

1 3 4 l 7
0 0 -5 l -15

(-3)1st+2nd and simplified then got:

1 3 4 l 7
0 0 1 l 3

and finally, (-4)2nd+1st:

1 3 0 l -5
0 0 1 l 3


Does this look right? I'm just wondering if I got the correct answer. Thanks

 

[estro]

You correctly ranked the matrix, but where is your solution?
It should be something like: (a,b,c) where a,b,c could be numbers or parameters.