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Cole's Computer Company charges $50 for a service call to your home to repair your computer system, and he charges $12 per hour, h, for labor for any repair. Cole uses this formula to calculate the total cost, t.


50 + 12h = t


Mr. Greene paid Cole a total of $86 for a repair. How many hours did it take to finish the job?


Group of answer choices


a. 3


b. 7


c. 5


d. 4