5(х-3)-2(6-х)=-34 найдите корень уравнения
5*x-5*3-2*(6-x)=-34 5x-15-2*(6-x)=-34 5x-15-(2*6-2*x)=-34 5x-15-(2*6-2*x)=-34 5x-15-(12-2x)=-34 5x-15-12+2x=-34 7x-15-12=-34 7x-27+-34 7x+-34+27 7x=_7 x=-7:7 x=-1
5х-15-12+2х+34=0 7х+7=0 7х=-7 х=-1