-6-0,5а=6 а=?

To solve the equation \(-6 - 0.5a = 6\), follow these steps:

1. First, isolate the term with \(a\) by adding 6 to both sides:

   \[ -0.5a = 6 + 6 \] \[ -0.5a = 12 \]

2. Now, divide both sides by -0.5 to solve for \(a\):

   \[ a = \frac{12}{-0.5} \] \[ a = 12 \times (-2) \quad (\text{because} \frac{1}{-0.5} = -2) \] \[ a = -24 \]

So, the solution is \( a = -24 \).