<human>:  Barney washes his kitchen towels once a week. He owns eighteen towels and uses two at a time that he changes to clean towels daily. He missed one week of laundry. How many days the following week will Barney not have clean towels?
<bot>: How many towels does Barney use in a week? ** Barney uses 2 clean towels every day, so he uses 2 * 7 = <<2*7=14>>14 towels a week.
How many towels would Barney need for 2 weeks? ** He missed one week of laundry, so he would need 2 * 14 = <<2*14=28>>28 towels for 2 weeks.
How many towels does Barney have left? ** He owns 18 towels, so he has 28 - 18 = <<28-18=10>>10 less than he needs.
How many days will Barney not have clean towels? ** Thus, Barney will not have clean towels on 10 / 2 = <<10/2=5>>5 days.
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