Mathematics, 29.01.2020 13:47, fluffyanimal456

Cell phone plan a costs $70 per month and comes with a free $500 phone. cell phone b costs $50 peronth but does not come with a phone. if you buy the $500 phone and choose plan b, how many months is it until your cost is the same as plan a's?

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Cell phone plan a costs $70 per month and comes with a free $500 phone. cell phone b costs $50 peron...