Two tariffs

You pay $20 and $0.05 per minute, and somebody else spends $15 and $0.25 per minute. How long would it take for both of you to spend the same amount?

Correct answer:

t =  25 min

Step-by-step explanation:

20+0.05 t=15+0.25 t  0.2t=5  t=0.25=25  t=25=25 min



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