BOD-х, COD-6x. AOC-6х/2=3х
х+6х+3х=180
10х=180
х=180/10
х=18
18 гард- BOD, 6*18=108град- COD, 3*18=54град- AOC
BOD-х, COD-6x. AOC-6х/2=3х
х+6х+3х=180
10х=180
х=180/10
х=18
18 гард- BOD, 6*18=108град- COD, 3*18=54град- AOC