In this case, we'll have to carry out several steps to find the solution. 
Step 01:
Data
- 3(4k + 6) = - 32
k = ? 
Step 02:
We must apply the algebraic rules.
- 3(4k + 6) = - 32 
-12k - 18 = -32 
-12k = - 32 + 18
k = -14 / (-12) 
k = 7 / 6 
The answer is:
k = 7 / 6