Final answer:
The expression -24-12w is equivalent to -24 + 12w.
Step-by-step explanation:
The expression -24-12w can be rewritten by combining the like terms. 
The like terms are -24 and -12w, which have coefficients of -24 and -12 respectively. 
To combine them, we add or subtract the coefficients. In this case, since the coefficients have different signs, we subtract them. 
So, -24 - (-12w) is equivalent to -24 + (-1)(-12w) = -24 + 12w. 
Therefore, the expression -24-12w is equivalent to -24 + 12w.