Problema Solution
wireless phone company "A" charges $20 per month plus $0.12 per minute.
wireless phone company "B" charges $50 per month plus $0.06 per minute.
how many minutes of calls will the monthly bill be the same?
Answer provided by our tutors
let x = the number of minutes
for x minutes A will charge: 20 + 0.12x
for x minutes B will charge: 50 + 0.06x
the monthly bill is the same means
20 + 0.12x = 50 + 0.06x
by solving we find
x = 500 min
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the monthly bill will be the same for 500 minutes.