k
\( 2k = 8 \)
\( k = \frac{8}{2} \)
\( k = 4 \)
\( k + m = -9 \)
\( 4 + m = -9 \)
m
\( m = -9 - 4 \)
\( m = -13 \)
Ответ: k = 4, m = -13.