Ответ:
-1,8х-1,2=7,8
-1,8х=7,8+1,2
-1,8х=9
х=9/(-1,8)
х=-5
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Ответ:
-1,8х-1,2=7,8
-1,8х=7,8+1,2
-1,8х=9
х=9/(-1,8)
х=-5