СРОЧНО ПОМОГИТЕ ДАЮ 20 БАЛЛОВ !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!В сплаве олова и серебра массой 223 кг олова на 28% больше, чем серебра. Сколько килограммов олова в сплаве?
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