3х-3х=0

The equation you provided is:

\[ 3x - 3x = 0 \]

When you simplify the left side, it becomes:

\[ 0 = 0 \]

This is a true statement regardless of the value of \( x \). Therefore, this equation indicates that there are infinitely many solutions for \( x \). Any real number you substitute for \( x \) will satisfy the equation.