mathjax variables. If the stylesheet you link to has the file extension of a …. In row-echelon form, the first non-zero entry in each row (if there is one) is a 1, and the column it is in corresponds to a leading variable; the columns that don't have that kind of 1 correspond to the free variables…. If one of the numbers is a float, the result is a float. Releases for MathJax: LaTeX for Drupal. 9 Further Information introducing the System 3 …. How to calculate $P(X