Question

1. $-9 = -8 + k$

Explanation:

Step1: Isolate the variable \( k \)

To solve for \( k \) in the equation \( -9 = -8 + k \), we need to isolate \( k \). We can do this by adding \( 8 \) to both sides of the equation (or equivalently, adding \( 8 \) to both sides to cancel out the \(-8\) on the right - hand side).
The equation becomes: \( -9+8=-8 + k+8\)

Step2: Simplify both sides

Simplify the left - hand side: \( -9 + 8=-1\)
Simplify the right - hand side: \( -8 + 8+k=k\)
So, \( k=-1\)

Answer:

\(k = - 1\)