I+II+III=22.730
I+II=16.297
II=III+2.753
Cat lapte s-a obtinut in luna III?
16.297+III=22.730
III=22.730-16.297
III=6.433 litri
cat lapte s-a obtinut in luna II?
II=III+2.753
II=6.433+2.753
II=9.186 litri
cat lapte s-a obtinut in I luna?
I+II=16.297
I+9.186=16.297
I=16.297-9.186
I=7.111
7.111+9.186+6.433=22.730