Question

1,2ax-(-0,6ax+3,4ax-2,9ax)-(7,3ax-0,8ax)

Answer 1

1,2ax-(-0,6ax+3,4ax-2,9ax)-7,3ax+0,8ax

1,2ax-(-0,6ax+3,4ax-2,9ax)-6,5ax
1,2ax-(2,8ax-2,9ax)-6,5ax
1,2ax-(-0,1ax)-6,5ax
1,2ax+0,1ax-6,5ax
1,3ax-6,5ax
-5,2ax