2-SAT & Who will read my blog

How many positive integral solutions can you find to this system of equations?

x1+x2=8
x2-x3=-3
x3+x4=14
x4-x5=-5
x5+x6=18
x6-x7=4
x7-x8=-3

Note:
1)xi>=1.
2)Neither I nor Shivanker could find a simple enough solution for this problem. Can you come up with the awesome and simple solution?

The JEE - A Final Word

To all JEE-2012 aspirants,

All the very best for tomorrow. :)

I hope you are content with your preparation. Because that feeling is what's the
most important. Even if you're not, tell your heart that you are. Ah, yes, aal iz well. :)
Believe me, it helps.

Now this is yet another simple exam. You can't change anything
at this point even if you treat it like something special. Its just another Test Series Examination!
(No I seriously don't mean the all-devastating AITS! Just another 6 hour exam.)

You can do it. But still, keep overconfidence at bay. Yes, you can do it.
Just be open. Open your eyes, mind, and conscience. Open to all the good things around you. :)

All the best once again.
(Nah.. I don't say best of luck.. Why luck? Believe in yourself.)

Cheers!
Anuj, Shivanker and Sambhav