Предмет: Математика, автор: Надя34

3,7a+15+4,1a=89,1решить уравнения

Ответы

Автор ответа: Pandolya

3,7а+4,1а+15=89,1
7,8а+15=89,1
7,8а=89,1-15
7,8а=74,1
А=74,1:7,8
А=9,5

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