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. For how many minutes of calls will the m

Question 329842: 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. For how many minutes of calls will the monthly bills be the same?
(A) 80 minutes
(B) 100 minutes
(C) 160 minutes
(D) 250 minutes
(E) 500 minutes
Answer by privani(34) (Show Source): You can put this solution on YOUR website!
Assuming:
monthly bill = M and minutes of call = m, form equations:
M=20+0.12m ....(1)
M=50+0.06m ....(2)
So,
M = 20 + 0.12m = 50 + 0.06m
0.12m - 0.06 = 50 - 20
0.06m = 30
m = 30/0.06
m = 500
Answer: (E) 500 minutes
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