Ответ:
0.6-1.6х+6.4=21-1.2х
7-1.6х=21-1.2х
-1.6+1.2=21-7
0.4х=14
х= -35
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Ответ:
0.6-1.6х+6.4=21-1.2х
7-1.6х=21-1.2х
-1.6+1.2=21-7
0.4х=14
х= -35