The expression \( 6 - m \) can be rewritten to determine its equivalence with the given options.
- \( m - 6 \) is not equivalent to \( 6 - m \).
- \( -m - 6 \) is not equivalent to \( 6 - m \).
- \( -m + 6 \) is equivalent to \( 6 - m \) because if we factor out a negative sign, \( 6 - m = -m + 6 \).
- \( m + 6 \) is not equivalent to \( 6 - m \).
Therefore, the correct equivalent expression is:
−m + 6 (negative m plus 6).