Упростите выражение и найдите его значение при х=2
1,8х-4(0,5х-0,1)
и
6(0,3-1,5х)+3,5х
1,8х-4(0,5х-0,1)
и
6(0,3-1,5х)+3,5х
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х=2
-0,2*2+0,4=-0,4+0,4=0
1,8-9х+3,5х=1,8-5,5х
х=2
1,8-5,5*2=1,8-11=-9,2
6(0.3-1.5х)+3.5х=18-9х+3.5х=18-5.5х 18-5.5х2=18-11=7