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Silviu s Adrian au impreuna 44 l de apa .Adrian are cu 4l mai mult .Cati l are Silviu?

Răspuns :

Adrian=a
Silviu=s
a+s=44
a=4+s
4+s+s=44\-4
2s=40=>s=[tex] \frac{40}{2} [/tex]=20
a=4+s=4+20=24
Silviu are 20 de litri.
Adrian are 24 de litri.