2*(1/7-х)-3 1/14=-2 5/7 /-дробь
2 1/7-2х-3 1/14=-2 5/7-2х=-2 1/7+3 1/14-2 5/7-2х=-1 11/14х+-1 11/14:(-2)х=25/28
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2 1/7-2х-3 1/14=-2 5/7
-2х=-2 1/7+3 1/14-2 5/7
-2х=-1 11/14
х+-1 11/14:(-2)
х=25/28