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Ответ дан
xxxeol

Пошаговое объяснение:

1) 2+5+4 = 11 частей в сплаве.

2) 550 г : 11 = 50 г - одна часть.

3) 50 г *(5 - 2) = 50*3 = на 150 г олова больше - ответ.

(5-2)=3 - можно и отдельной строкой.

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