Предмет: Математика, автор: wersin2

3.7а+15+4,1а=89.1 решите пожалуйсто

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Автор ответа: простородитель

1

3,7а+15+4,1а=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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