Question

Leila purchased a pre paid phone card for $25. Long distance calls cost 22 cents a minute using this card. Leila used her card only once to make a long distance call. If the remaining credit on her card is $19.50 , how many minutes did her call last?

Answer 1

Leila's call lasted for 25 minutes.

Explanation:

inital amount - (0.22 * minutes on the phone) = final amount

25 - 0.22x = 19.5

Solve for x

Subtract 25 from both sides

-0.22x = -5.5

Divide both sides by -0.22

x = 25