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Beantwortet: äquivalenzumformungen, terme, variablewerw

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Hallo,

nochmal ganz ausführlich:

      7x+4  = 4x +7        | -4x

 7x-4x +4 = 4x-4x +7 

    3x+4    =   7                |  -4

3x+ 4-4    = 7-4  

            3x =3                  | durch 3 teilen

          3x/3= 3/3

               x=1


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