To solve the equation \(-3 - |6 - 3x| + 7 = 4\), we start by simplifying the left-hand side:
\[ -3 + 7 - |6 - 3x| = 4 \]
This simplifies to:
\[ 4 - |6 - 3x| = 4 \]
Subtracting 4 from both sides gives us:
\[
- |6 - 3x| = 0 \]
Multiplying through by -1, we have:
\[ |6 - 3x| = 0 \]
The absolute value of an expression is zero when the expression itself is zero. So we set the inside equal to zero:
\[ 6 - 3x = 0 \]
Next, we solve for \(x\):
\[ 3x = 6 \] \[ x = 2 \]
Thus, the solution to the equation is:
\[ \boxed{2} \]
Among the options provided, "x=2" is the correct response.