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Odata ,Setila abaut tot vinul din 4damingene si 3 butoiase pline,in total 180L.Intr-un butoias era tot atata vin cat in 2damingene.Cat vin era an fiecare vas?

Răspuns :

4d+3b=180
b=2d
4d+3*2d=180
4d+6d=180
10d=180
d=180:10=18 l (o damigeana are 18 l)

b=2d
b=2*18
b=36 l (un butoi are 36 de l)