-7·(4a-1,5)=
-2·(5a-6b)=
-0,5·(4a-1,2b+3,4)=
-1,2·(5a-3d-4)=
6,1·(2a-1,1b+4)=
1,5·(4,8a+2,6b+1)=
-8·(1,5+2,5b+4)=

-7(4а-1.5)=-28а+10.5-2(5а-6b)=-10a+12b-0.5(4a-1.2b+3.4)=-2a+0.6b-1.7-1.2(5a-3d-4)=-6a+3.6d+4.86.1(2a-1.1b+4)=12.2a-6.71b+24.41.5(4.8a+2.6b+1)=7.2a+3.9b+1.5-8(1.5+2.5b+4)=-12-20b-32=-44-20b

1. -28a+10.52. -10a+12b3. -2a+0.6b-1.74. -6a+3.6d+4.85. 12.2a-6.71b+24.46. 7.2a+3.9b+1.57. -44-20b