Ответ:13х+14х=378
27х=378
х=14
13х + 14х = 378
27х = 378
27х = 378 | : 27
х = 14.
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Ответ:13х+14х=378
27х=378
х=14
13х + 14х = 378
27х = 378
27х = 378 | : 27
х = 14.
Ответ : х = 14.