Answer:
[tex] \huge \orange { \boxed{x = \frac{c - k}{12} }}[/tex]
Step-by-step explanation:
12x + k = c
Step 1: transfer k on right side
12x = c - k
Step 2: Divide both side by 12
[tex] \frac{12x}{12} = \frac{c - k}{12} \\ \huge \red{ \boxed{x = \frac{c - k}{12} }}[/tex]