Question

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Part 1
Solve and check.
aminus7equalsminus21
Question content area bottom
Part 1
The solution is aequals
  
enter your response here.
​(Type an integer or a simplified​ fraction.)

Answer 1

To solve the equation \( a - 7 = -21 \), you can isolate \( a \) by adding 7 to both sides of the equation:

\[
a - 7 + 7 = -21 + 7
\]

This simplifies to:

\[
a = -14
\]

So the solution is \( a = -14 \).

To check the solution, substitute \( a \) back into the original equation:

\[
-14 - 7 = -21
\]

Simplifying the left side:

\[
-21 = -21
\]

Since both sides are equal, the solution \( a = -14 \) is correct.

Thus, the final answer is:

\[
\text{The solution is } a = -14.
\]