Ответ:
4,2х+5,4х+1,08=3,96
4,2х+5,4х=3,96-1.08
9,6х=2,88
х=0,3
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Ответ:
4,2х+5,4х+1,08=3,96
4,2х+5,4х=3,96-1.08
9,6х=2,88
х=0,3