Ответ:
(х-3)(х+4)-х(х+5)
(х-3)(х+4)-2х+5х
х-3×х+4-2х+5х
9х=1
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Ответ:
(х-3)(х+4)-х(х+5)
(х-3)(х+4)-2х+5х
х-3×х+4-2х+5х
9х=1