Answer:
.
Step-by-step explanation:
Imagine that the variable c represents something tangible, like an orange. So what this equation is asking is subtract 1 orange from 12 oranges. So you are left with 11 oranges.
Another way to think about this problem is if you rewrite the equation slightly to:
12c - c =
12c - 1c =
11c
1. 5
2. 5
3. 2x
4. 8m
5. 5
6. 11c