Cell phone company A charges $20 per month plus $0.05 per text message. Cell phone company B charges $10 per month plus $0.07 per text message. Is there any number of text messages that will result in the exact same charge from both companies?

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14 August, 15:41

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Ruffles · Answer 1

1) Make them into equations.

0.05x + 20 = 0

0.07x + 10 = 0

2) Equate the two.

0.05x + 20 = 0.07x + 10

0.02x = 10

x = 500