Give the step-by-step reasoning process and then the final answer. Jay went to watch a singer in a one hour 20 minutes concert. If there was a 10-minute intermission, and all the songs were 5 minutes except for one song that lasted 10 minutes, how many songs did she sing?
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The time the singer had for singing was 80 - 10 = 70 minutes. The time the singer had for singing 5 - minute songs was 70 - 10 = 60 minutes. The number of 5 - minute songs was 60 / 5 = 12 songs. The total number of songs sung is 12 + 1 = 13 songs.
The final answer: 13.
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