# Math Help - Find exact solution to system?

1. ## Find exact solution to system?

I am working my homework out and ran into a snag. Be advised that this is only the third day of class so advanced concepts have not yet been learned.

Using just the basics I am trying to do this problem. See attached image file.

I did the first step..now on the second step I'm not sure what to do.
I just need concepts mostly. Any help would be appreciated.

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http://viewmorepics.myspace.com/inde...ageID=70399303
Click link to see image file.

Thanks.

2. if i put in REF form and on bottom row i have

0 0 0 1 a(b+3)/(a+b) which corresponds to
w = a(b+3)/(a+b)

So can I say the system has a unique solution when w = a(b+3)/(a+b)?

I'm so confused.

3. As long as $a+ b\ne 0$ that is the unique solution. Now, go back to before you divided by a+ b. What happens if a+ b= 0?

4. ## Thanks

Appreciate the help. I finally figured it all out for that problem. Pfew!

The dividing by potential 0's were def a bad move.