SOLUTION: janes cell phone plan is $40 per month plus $.15 per minute for each minute over 200 minutes of call time. if janes cell phone bill is $58.00, for how many extra calling minutes wa

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Question 660778: janes cell phone plan is $40 per month plus $.15 per minute for each minute over 200 minutes of call time. if janes cell phone bill is $58.00, for how many extra calling minutes was she billed ?
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
x = minutes over 200
58 = 40 + .15(x)
58 - 40 = .15x
18 = .15x
18/.15 = x
120 = x
Billed for 120 additional minutes