SOLUTION: A trailer is rented at $30 per day plus a charge per mile of use. The trailer traveled 25 miles in one day and the total charge was $130. Which equation can be used to find the cha

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Question 970031: A trailer is rented at $30 per day plus a charge per mile of use. The trailer traveled 25 miles in one day and the total charge was $130. Which equation can be used to find the charge x, in dollars, per mile traveled?
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
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C=total charge; m=miles; x=charge per mile; f=daily fee
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C=f+xm Subtract f from each side.
C-f=xm Divide each side by m.
(C-f)/m=x
ANSWER: The rate per mile equals (total charge - daily fee) divided by the mileage.
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%28C-f%29%2Fm=x
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%28130dollars-30dollars%29%2F25miles=x
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100dollars%2F25miles=x
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4+dollars%2Fmile=x The rate was $4.00 per mile.