−7x−15=−15x+9?

Sure, let's solve the equation step by step:

1. First, let's move all the terms involving x to one side of the equation and the constants to the other side. We can do this by adding 15x to both sides and adding 15 to both sides. This gives us:

   -7x + 15x = 9 + 15

2. Simplify both sides:

   8x = 24

3. Finally, to solve for x, divide both sides by 8:

   x = 24 / 8

4. Simplify to get the final answer:

   x = 3