Answer:
x = 1, 12
Explanation:
Given the equation:

This can be set as:

Solve equations like linear, add both sides by 1 for x - 1 and add both sides by 12 for x - 12:

Instead of using "or" for conjunction, we can simply write the solution as x = 1, 12 (or you can also write x = 12, 1)
Additional Info
If you see the equation in form of
then you can just simply solve like linear separately and combine solutions together as one.