Предмет: Математика, автор: halya1552

Нужно срочно решить!​

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Автор ответа: OberstW
0

20 цыплят

щенок - x

котенок - y

цыпленок - z

мышь - d

{x+y = 10z          { x + 10d = 30d <=> x = 20d

{y = 10d      <=>  { y = 10d

{2d + y = 4z       {12d = 4z

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Текст здесь
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