SOLUTION: Amy purchased a prepaid phone card for $30.00 . Long distance calls cost 17 cents a minute using this card. Amy used her card only once to make a long distance call. If the remaini

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Question 834279: Amy purchased a prepaid phone card for $30.00 . Long distance calls cost 17 cents a minute using this card. Amy used her card only once to make a long distance call. If the remaining credit on her card is ,$27.11 how many minutes did her call last?
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
Guessing that the $30 is for both the phone and the service, if t is the number of minutes of long distance call, then t%2A%280.17%29 is the cost of her call.

30-0.17%2At=27.11
If that makes sense, then this is good. Solve for t.