Mathematics, 15.09.2021 16:00 danielahchf

A phone company offers two monthly plans. Plan A costs $21 plus an additional $0.08 for each minute of calls. Plan B costs $13 plus an additional $0.12 for each minute of calls. For what amount of calling do the two plans cost the same?
What is the cost when the two plans cost the same?

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A phone company offers two monthly plans. Plan A costs $21 plus an additional $0.08 for each minute...