Предмет: Математика, автор: ubaburina

Решить уровнение 0,4(6-2у)=4,5-0,8(у+9)

Ответы

Автор ответа: alekseileonov0308

Ответ:0,4(6-2у)=4,5-0,8(у+9)

2,4-0,8у=4,5-0,8(у+9)

2,4-0,8у=4,5-0,8у-7,2

2,4=4,5-7,2

2,4=-2,7

Ответ: у принадлежит (зачёркнутая О)

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