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:

\( b = 0 \)