Changing IP address of SVN Host (Server)

Daily i am using SVN for code submitting to my superiors  but one day unfortunately i am try to submit code to SVN but it showing some error after some i identified my SVN system IP address is changed .

I don't know to change IP old to new IP address for that solution is following command line we can change IP address of SVN

$svn switch  relocate http://old_ip_address/svn/project_name http://new_ip_address/svn/project_name

above command working in Ubuntu terminal 

For Solving two equation through online

In our daily life we busy with developing new application and writing new code but unfortunately some times we need to solve some equations solving equations is some what tricky

examples:

solving two straight line equations is very easy process but solving two ellipses equation little tricky process so for that some online website is there . This website we have to enter two equation they will give intersection between two equation

link is http://www.wolframalpha.com/