14х+7х-3х=108
18х=108
х=108:18
х=6
14*6+7*6-3*6=108
108=108
Ответ: х=6
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14х+7х-3х=108
18х=108
х=108:18
х=6
14*6+7*6-3*6=108
108=108
Ответ: х=6