some questions I have on a test that I need ASAP...
(for 20 points)

1. j + 12 = 25. What is the value of j?

2. k - 16 = 4. what is the value of k?

3. 12 = 8 + c. what is the value of c?

4. r/10 = 4. what is the value of r?

5. 64 = 16u. what is the value of u?

6. 3v = 12. what is the value of v?