Question

question
solve for b.
-21 = -21 - b

Explanation:

Step1: Add 21 to both sides

To isolate the term with \( b \), we add 21 to both sides of the equation \(-21 = -21 - b\).

$$ -21 + 21 = -21 - b + 21 $$

Simplifying both sides, we get:

$$ 0 = -b $$

Step2: Multiply both sides by -1

To solve for \( b \), we multiply both sides of the equation \( 0 = -b \) by -1.

$$ 0 \times (-1) = -b \times (-1) $$

Simplifying both sides, we get:

$$ b = 0 $$

Answer:

\( b = 0 \)