Repedeeeeeeeeeeeeeeee
![Repedeeeeeeeeeeeeeeee class=](https://ro-static.z-dn.net/files/d48/cfe49b43ccf0a87d56352e1f32138b46.jpg)
Răspuns:
Explicație pas cu pas:
3/7 acustice
7/7-3/7=4/7 instrumente neacustice
Ca numar 4×49/7=4×7=28