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Ответ

Ответ дан
kruglenkonata804

Объяснение:

Р =2 (a+b)

Р=2а+2b

2a=P-2b

a=(P-2b)/2

Ответ

Ответ дан
safr02

Ответ:

А= P/2 - B

Вроде бы так (не обращать внимание, там должно быть не меньше 20 символов )

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