Step-by-step explanation:
12 - 9 + c = 12
-9 + c = 12 - 12
- 9 + c = 0
Therefore c = 9
Hope this helps.!
Answer:
c=9
To solve, we must isolate the variable, c
12-9+c=12
Combine like terms (subtract 9 from 12)
3+c=12
Subtract 3 from both sides to "reverse" the addition being done to c
