15 + .08 x = 3 + .12 x
s
12 = .04 x
x = 1200/4 = 300
You are choosing between two telephone plans. Plan A has a monthly fee of $15 with a charge of $0.08 per minute for all calls. Plan B has a monthly fee of $3 with a charge of $0.12 per minute for all calls. How many calling minutes in a month make plan A the better deal?
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