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Kala purchased a prepaid phone card for $30. Long distance calls cost 12 cents a minute using this card. Kala used her card only once to make a long
distance call. If the remaining credit on her card is $27.12, how many minutes did her call last?

Respuesta :

Answer:

24 minutes

Step-by-step explanation:

$30 - 0.12x = $27.12

        -0.12x = -2.88

                x = 24

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