Question

3,8a - 1,2b - ( 1,1b + 3,8a) =

Answer 1

3.8a - 1.2b -1.1b -3.8a = -2,3b

Answer 2

$3,8a-1,2b-(1,1b+3,8a)=3,8a-1,2b-1,1b-3,8a=(3,8a-3,8a)+(-1,2b-1,1b)=-(1,2b+1,1b)=-2,3b$