1-5x : 1-5x

It looks like you have the expression \( \frac{1 - 5x}{1 - 5x} \).

As long as \( 1 - 5x \neq 0 \), this expression simplifies to 1 because any non-zero expression divided by itself equals 1.

However, if \( 1 - 5x = 0 \), then you would be dividing by zero, which is undefined. To find the value of \( x \) that makes \( 1 - 5x = 0 \):

1. Set the equation \( 1 - 5x = 0 \).

2. Solve for \( x \):

   \[ 5x = 1 \implies x = \frac{1}{5} \]

So, the expression \( \frac{1 - 5x}{1 - 5x} \) simplifies to 1 for all \( x \) except \( x = \frac{1}{5} \), where it is undefined.