1)2(3х-6)=6х-12
2)-10-2(2х-7)=-10-4х+14=4-4х
3)-2(4+3х)+8х=-8-6х+8х=-8+2х
4)28х-5(6х-0,2)=28х-30х+1=-2х+1
5)4х+(8-6х)=4х+8-6х=-2х+8
6)-13х-(4-9х)=-13х-4+9х=-4х-4
7)2(6+7х)-(12х+11)=12+14х-12х-11=1+2х
8)8х-(19х-6)+4(3х-1)=8х-19х+6+12х-4=
х+2
9)-5(2х-1)-3(3-5х)=-10х+5-9+15х=5х-4