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Mathematics, 18.08.2019 12:10 ymlantigua21

The concert lasts 60 minutes, and the songs are all the same length. the choir sings a total of 12 songs, 2 of which are sung by the sopranos only. for how many minutes do the sopranos sing by themselves? solve the equations using a letter for the unknown quantity.

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The concert lasts 60 minutes, and the songs are all the same length. the choir sings a total of 12 s...

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