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Zdravím, vie mo niekto prosím poradiť tento príklad? Ďakujem.
Jano by vymaľoval sám izbu za 10 hodín, Peter by vykonal tú istú prácu za 12 hodín, Matejovi by to trvalo 15 hodín. Za aký čas vymaľujú izbu, ak budú pracovať všetci spoločne?
Paní učitelka nám dala poznámky Atóm a jeho štruktúra a na úlohu nám dala toto a nechápem tomu. Chcela by som poprosiť o pomoc a vysvetlenie. Za každú odpoveď ďakujem
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