Ответ:
(х+17/2) - 17/4 = 18
х+17/4 = 18
х = 18-17/4
х= 55/4 или же 13.75
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Ответ:
(х+17/2) - 17/4 = 18
х+17/4 = 18
х = 18-17/4
х= 55/4 или же 13.75