Ответ:
(7х+9)-(11х-7)=8
7х+9-11х+7=8
-4х+16=8
-4х=8-16
-4х= -8
х = 2
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Ответ:
(7х+9)-(11х-7)=8
7х+9-11х+7=8
-4х+16=8
-4х=8-16
-4х= -8
х = 2