Let's analyze the steps provided:
- Original equation: \( 3x - 9x + 1 = 2(-3x + 1) - 1 \)
- Simplified to: \( -6x + 1 = -6x + 2 - 1 \)
- Further simplified to: \( -6x + 1 = -6x + 1 \)
The final statement \( -6x + 1 = -6x + 1 \) is true for all values of \( x \).
Because the equation simplifies to a true statement, it means that the original equation is an identity, which means there are infinitely many solutions.
Thus, the correct choice is:
There are infinitely many solutions to the equation.