Khan/khan-exercises — pull request #7406 by praveenRamalingam (2011-12-01 00:06:15+00:00)
Title: Minorfixes - In Progress

Bugs fixed so far, will continue to work on remaining

Slope-intercept to standard form ambiguous answer
Units exercise minor hint grammar issue
Negative number word problem clarification
Add clarification to question and hints
Add an extra hint if the answer is reduced
Remove extraneous hint