Ответы на вопрос:
1)(20.2-0.6х)*5.4+21.42=114.3109,08-3,24х+21,42=114,3-3,24х=114,3-109,08-21,42-3,24х=-16,2-х=-5х=52) (6.9х-4.7х-2х-13.8)/4=21.66,9х-4,7х-2х-13,8=21,6*(-4)+13,8 6,9х-4,7х-2х =-86,4+13,80,2х=-72,6х=-3633) 1.5*(2.4+1.2х)+0.9*(0.7-1.2)=51.123,6+1,8х+0,63-1,08=51,12 1,8х=51,12-3,6-0,63+1,08 1,8х=47,97 х=26,65
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