Упростите выражения: -0,2(2х-1)+4,2(0,5х-8х)
-0,2(2х-1)+4,2(0,5х-8х)=-0,4х+0,2-31,5х=-35,5х+0,2
-0.2(2х-1)+4.2(0.5х-8х)=-0.4х+0.2+2.1х-33.6х=-0.4х+2.1х-33.6х+0.2=(-0.4+2.1-33.6)*х+0.2=-31.9х+0.2