Ответ:
4/7х-4/7-х=2/7
4/7-7/7х=2/7+4/7
-3/7х=6/7
х=6/7:(-3/7)=6/7*(-7/3)=-2
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Ответ:
4/7х-4/7-х=2/7
4/7-7/7х=2/7+4/7
-3/7х=6/7
х=6/7:(-3/7)=6/7*(-7/3)=-2