SOLUTION: jimmy is having speaker wire run in his family room. to install the speaker wire, one company charges $85 plus $.20 per foot of wire used. if jimmy needs the cost of installation t

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Question 545181: jimmy is having speaker wire run in his family room. to install the speaker wire, one company charges $85 plus $.20 per foot of wire used. if jimmy needs the cost of installation to remain below $95, how many feet of wire can he have installed?
i need to solve using the 5 steps for problem solving. i do not understand.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
I'm not sure what the 5 steps are, but here's what I do:
let +w+ = length of wire in ft
Let +C+ = cost of installation
given:
+C+%3C+95+
-----------
+C+=+85+%2B+.2w+
+95+=+85+%2B+.2w+
+.2w+=+95+-+85+
+.2w+=+10+
+w+=+50+
The length of wire can be a maximum of 50 ft to
keep the cost under $95
---------------------
I'm guessing some of the 5 steps are:
(1) assign variables to unknowns
(2) establish units for all data
(3) List given data
(4) Write equations with number of
equations = number of unknowns
(5) Solve equations