Cell phone Plan A costs $80 per month and comes with a free $600 phone. Cell phone Plan B costs $60 per month but does not come with a phone. If you buy the $600 phone and choose Plan B, how many months is it until your cost is the same as Plan A's?
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Tina J.
asked • 05/03/18
Cell phone Plan A costs $70 per month and comes with a free $500 phone. Cell phone Plan B costs $50 per month but does not come with a phone.
Cell phone Plan A costs $70 per month and comes with a free $500 phone. Cell phone Plan B costs $50 per month 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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Thomas R. answered • 05/03/18
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Okay, not too bad, this one. Let's organize first by identifying each plan:
A = 70*M
B = 500 + 50*M
Costing the same means equal, so we have the equation:
70M = 500 + 50M
-50M -50M
20M = 500
20M / 20 = 500 / 20
M = 25 months
Explanation:
it is too easy ans .