-9=15+v/3 -24=v/3 v=-72 correct??

Right.

yes

Yes, your solution is correct.

To arrive at this solution, we can solve the given equation step by step:

1. Start with the equation: -9 = 15 + v/3.

2. To eliminate the fraction, we can multiply both sides of the equation by 3: 3*(-9) = 3*(15 + v/3).
-27 = 45 + v.

3. Next, isolate the variable by subtracting 45 from both sides of the equation: -27 - 45 = v.
-72 = v.

So, the correct solution to the equation -9 = 15 + v/3 is v = -72.