x-cantitatea comandata
I luna : a comandat 2x/6
x-2x/6=(6x-2x)/6=4x/6 simplificam=2x/3 rest
II luna :6/10·2x/3=12x/30 simplificam =2x/5
2x/3-2x/5=(10x-6x)/15=4x/15
4x/15=5720
x=5720·15/4
x=21450
verificare
I luma:21450·2/6=7150
21450-7150=14300
II luna: 14600·6/10=8580
14300-8580=5720