Let's solve the absolute value equation step by step:
The equation is:
\[ 4|7 - x| + 1 = -1 \]
First, we can isolate the absolute value term by subtracting 1 from both sides:
\[ 4|7 - x| = -1 - 1 \]
This simplifies to:
\[ 4|7 - x| = -2 \]
Now, divide both sides by 4:
\[ |7 - x| = -\frac{1}{2} \]
The absolute value of a number cannot be negative. Since \(|7 - x|\) represents a distance (which is always non-negative), this equation has no solution.
Thus, the answer is:
no solution.