One cell phone plan charges $20 per month plus $.15 per minute used. A second cell phone plan charges $35 per month plus $.10 per minute used. Write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.

Question

Mathematics

Damari Byrd

13 March, 23:20

One cell phone plan charges $20 per month plus $.15 per minute used. A second cell phone plan charges $35 per month plus $.10 per minute used. Write and solve an equation to find the number of minutes you must talk to have the same cost for both calling plans.

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Answers (1)

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Chang · Answer 1

20+0.15x = 35+0.10x

0.15x=15+0.10x

0.05x=15

x = 15/0.05

x = 300minutes

check:

300*.015 = 45+20=65

300*0.10 = 30 + 35 = 65

they equal

so number of minutes would be 300