Question

10y-(12y-(y-b))Помогите пожалуйсто экзамен Нужно упростить!

Answer 1

10у-(12у-(у-b)) = 10y-(12y-y+b) = 10y-12y+y-b = -y-b

Answer 2

$10y-(12y-(y-b))=10y-(12y-y+b)=10y-11y-b=-y-b$