Question 832754
6(k-1)-(5k-9)= -6 
6k-6-5k+9 = -6
k+3 = -6
k = -9
check the answer
6(-9-1)-(5*-9-9) = -6
-60 -(-54) = -6
-60+54 = -6
-6 = -6
answer checks  :-)