Предмет: Алгебра, автор: peiindirsamoil

помогите решить пожалуйста ((

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Автор ответа: mishka19

20 + 20 + 60 + 100 + 140 + 180 + 220 + 260 + 200 + 140 + 80 + 20 = (20 + 180) + (20 + 80) + (60 + 140) + (100 + 200) + (140 + 260) + (220 + 20) = 200 + 100 + 200 + 300 + 400 + 240 = 1440

Ответ: 1440

Автор ответа: peiindirsamoil

Спасибо мишка))

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