Ответ:
(х+3)(2х-1)-2х²=7
2х²-х+6х-3-2х²=7
5х-3=7
5х=11
х=2.5
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Ответ:
(х+3)(2х-1)-2х²=7
2х²-х+6х-3-2х²=7
5х-3=7
5х=11
х=2.5