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lesya [120]
3 years ago
8

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 pe

r text message. Is there any number of text messages that will result in the exact same charge from both companies?
Mathematics
1 answer:
romanna [79]3 years ago
6 0
So for this you need to set the two equations equal to each other. 20+.05x=10+.07x then solve. Subtract .05 from both sides and get 20=10+.02x. Then subtract 10 from the other side and get 10=.02x Isolate x by dividing 10 by .02. This leaves you with the answer of 500 texts. 
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