To solve for \( x \) in the equation \( 0 = -x + 12x \), we can simplify it:
\[ 0 = 11x \]
Now, divide both sides by 11:
\[ 0 = x \]
So, in this case, \( x = 0 \).
However, this equation alone does not provide information about how far the balloon travels before it reaches the ground. If you have a different equation or more context about the balloon's motion (like initial height, rate of ascent, or other details), please provide that information, and I can help you calculate the distance the balloon will travel before it reaches the ground.