SOLUTION: An electrician sent Bonnie an invoice in the amount of a dollars for 6 hours of work that was done on Saturday. The electrician charges a weekend fee, f, in addition to an hourly r

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Question 891432: An electrician sent Bonnie an invoice in the amount of a dollars for 6 hours of work that was done on Saturday. The electrician charges a weekend fee, f, in addition to an hourly rate, r. Bonnie knows what the weekend fee is. Write a formula Bonnie can use to find, r, the rate the electrician charges per hour.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
a = invoice bill
t = 6, time worked
f = fee for weekend
r = hourly rate ------ UNKNOWN

Account for the bill:
t%2Ar%2Bf=a

tr=a-f
highlight%28r=%28a-f%29%2Ft%29