Question 861426
One like this was just done a few minutes ago.  For parallel lines, the slopes are EQUAL.  The only value different in the standard form equation will be c.  


For reference, see this:  <a href="http://www.algebra.com/algebra/homework/word/numbers/Numbers_Word_Problems.faq.question.861427.html">Question Number 861427 is similar but was for perpendicular instead of parallel.</a>