$8k+5=-\left( 9-k \right)$
When there is a $-$ in front of an expression in parentheses, change the sign of each term of the expression and remove the parentheses$8k+5=-9+k$
Move the variable to the left-hand side and change its sign$8k+5-k=-9$
Move the constant to the right-hand side and change its sign$8k-k=-9-5$
Collect like terms$7k=-9-5$
Calculate the difference$7k=-14$
Divide both sides of the equation by $7$$k=-2$