Question 758394
Those two descriptions seem to be the same thing.  Give us more information about the solution she set up.  Was this after solving an analyzed set of equations, or was this solution set up directly from the analyzed worded description of the problem?  


Sometimes, through the solution symbolic steps (arithmetic or algebra), multiplications or divisions create "extraneous" solutions as a result of the near-end of the process, and one or the other or so of these solutions will either NOT work in the original equation; or will make no sense for the original problem description.  


You can or should try this help request again BUT TELL US EXACTLY What is "problem 6".