how do i define variable and write equation for...

The perimeter of a square equals 4 time the length of a side?

1 answer

http://www.google.com/search?hl=en&rlz=1G1GGLQ_ENUS338&ie=UTF-8&defl=en&q=define:variable&ei=f6NzSoy9FIeCMoDfnbEM&sa=X&oi=glossary_definition&ct=title

P = 4s