Ответ:
3х-123=2х 3(х-1)-х=5
3х-2х=123 3х-3-х=5
х=123 3х-х=5+3
2х=8
х=4
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Ответ:
3х-123=2х 3(х-1)-х=5
3х-2х=123 3х-3-х=5
х=123 3х-х=5+3
2х=8
х=4