1)-2(6-9х)-(х+3)=-12+18х-х-3=17х-15
2)-6(3+х)+8(2-х)=-18-6х+16-8х=-14х-2
3)-(-2х+7)-3(х-1)=2х-7-3х+3=-х-4
4)4(2-5х)-5(3-4х)=8-20х-15+20х=-7
5)2(12а-1)-6(2-3а)-3(8а+5)=24а-2-12+18а-24а-15=18а-29
6)-5(4b+3)-(18+b)+15(1+2b)=-20b-15-18-b+15+30b=9b-18
7)16(c-3)+8(5-2c)-(10c-8)=16c-48+40-16c-10c+8=-10c
8)-12(7-2d)-9(7d-5)-3(15+8d)=-84+24d-63d+45-45+24d=-15d-84