Ответ:
7х+4=18 7х=18-4 7х=14 х=2 7х=2х+25 7х-2х=25 5х=25 х=5 х+5=-2х+35 х+2х=35-5 3х=30 х=3
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Ответ:
7х+4=18 7х=18-4 7х=14 х=2 7х=2х+25 7х-2х=25 5х=25 х=5 х+5=-2х+35 х+2х=35-5 3х=30 х=3