Question

2*(500-y:3)=820
Скоко будет?

Answer 1

1000-2y/3=820
2y/3=180
2y=540
y=270

Answer 2

Эм

Answer 3

эм

Answer 4

500-у:3=820:2
500-у :3=410
-у:3=410-500
-у:3=-90
-у=-90×(-3)
-у=-270
у=270