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a)30saci-60kg/sac
?saci-40kg/sac
12saci-?kg/sac
b)30trepte-20cm/treapta
?trepte-25cm/treapta
15trepte-?cm/treapta

Răspuns :

Capsunica35
30s....60kg
xs........40kg
x=30*40/60=20 saci

30s........60kg
12 s........xkg
x=12*60:30=24 kg

30trepte.........20cm
x tr.................25cm
x=25*30:20=37,5 tr

30tr...........20cm
15tr............x cm
x=15*20/30=10 cm

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