Question

Розкрий дужки і спрости вираз:−(10−b)−20

Answer 1

Ответ: b-30

Пошаговое объяснение:

-(10-b)-20=-10+b-20=b-30

Answer 2

Объяснение:
-10+б-20= б-30

Answer 3

To simplify the expression, let's start by distributing the negative sign to both terms inside the parentheses:

-(10 - b) - 20

Distributing the negative sign:

-10 + b - 20

Now, combine like terms:

-10 - 20 + b

Finally, simplify further:

-30 + b

So the simplified expression is: -30 + b or b - 30.