решите уравнения x-1.7=4x-13.4 ,4*(12-2x)=102-2x

х-1.7=4х-13.4х-4х=-13.4+1.7-3х=-11.7х=-11.7:-3х=3.94(12-2х)=102-2х48-8х=102-2х-8х+2х=102-48-6х=54х=54:-6х=-9

1) х-1,7=4х-13,4х-4х=-13,4+1,73х=-11,7х=-3,92) 4×(12-2х)=102-2х48-8х=102-2х-8х+2х=102-48-6х=54х=-9.