Question

0,7* (8a-0,4b)-0,2(2,5a-1,5b

Answer 1

0,7*(8a-0,4b)-0,2(2,5a-1,5b)= 5,6а-0,28b-0,5a+0,3b = 5,6a-0,5a-0,28b+0,3b =
5,1a+0,02b.