Pre algebra using the equation ax+b=c to solve

User Generated

Ebfun

Mathematics

Description

Salma purchased a prepaid phone card for 
.
 Long distance calls cost 
 cents a minute using this card. Salma used her card only once to make a long distance call. If the remaining credit on her card is 
, how many minutes did her call last?

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Explanation & Answer

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Total prepaid balance available = $15

Remaining credit = $8.7

Amount used up in the call = 15-8.7 = $6.3 = 630 cents

Time taken to make the call = 630/14 = 45 minutes.

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