Question

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.

Answer 1

10 minutes

Explanation:

60 / 12 = 5

5 *2 = x=10

this means that x = 10

Answer 2

60mins= 12x
60/12=12x/12
5=x
x= length of songs
5 x 2= 10 mins soprano sings by themselves