math
posted by Geno .
Customers of a phone company can choose between two service plans for long distance calls. The first plan has an $18 onetime activation fee and charges 10 cents a minute. The second plan has no activation fee and charges 15 cents a minute. After how many minutes of long distance calls will the costs of the two plans be equal?

Try to make two equations, one for each phone company.
First plan:
y = .10x + 18
Second plan:
y = .15x
Try plugging in numbers until the two equations have the same y. If you need anymore explanations, just respond back.
Hope I helped!
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