Answer: 9
Step-by-step explanation:
If 12 is the whole length, and 3 is a small section of it, then 3 + j = 12
Or 12 - 3 = j
Therefore, 12 - 3 = 9
Answer:
9 = j
12 - j = 3
Adding j to both sides, we get 12 = 3 + j
Combining like terms, we get 9 = j
