Răspuns:
1800 €salariu
|.....|. ...|.....|.....|.....|.....|.....|.....|.....|
|.....| ....| pune deoparte
raman |....|....|....|.....|....|....|....|
1800:9=200este valoarea unui segment
200×2=400€pune deoparte
1800-400=1400€
1400€:2=700€cheltuie pentru casa
R:700€
coroana!