3а-8а+15а-7а= -7b+4b-19b-9= -9,4-6,8b+3,5a-1,7b+2,7= 4(4x-2)+7(1-6x)=...

Question

3а-8а+15а-7а=
-7b+4b-19b-9=
-9,4-6,8b+3,5a-1,7b+2,7=
4(4x-2)+7(1-6x)=
0,3(x-5y-2)-0,8(2y-3x)=

Answer 1

1) 3а
2) -22b-9
3)-6.7-8.5b+3.5a
4)-26x-1
5)2.7x-3.1y-0.6