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20 October, 04:39

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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  1. 20 October, 04:58
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    60mins = 12x

    60/12=12x/12

    5=x

    x = length of songs

    5 x 2 = 10 mins soprano sings by themselves
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