Answer
not equivalent
Work Step by Step
Find the solution for $9+b\gt24$ to determine whether it is equivalent to $b\gt33$.
$9+b\gt24\longrightarrow$ subtract9 from each side
$9+b-9\gt24-9\longrightarrow$ subtract
$b\gt15$
Since the solutions for b are not the same, the two expressions are not equivalent.
