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fruktikfruktik

Ответ:

1)5+2(х-1)=5+2х-2=+3

2)(3х-7)-(+5)=3х-7-2х-5=х-12

3)2(х-0,5)+1=9

2х-1+1=9

х=9:2

х=4,5

Ответ :4,5

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