To isolate \( m \) in the equation \( \frac{3}{2} m + 5 = m + 15 \), you can start by getting rid of the \( \frac{3}{2} m \) term on the left side. The appropriate move to keep the equation balanced is to subtract \( \frac{3}{2} m \) from both sides.
So, the correct action is:
Subtract \( \frac{3}{2} m \) from both sides.
After performing that step, the equation would look like this:
\[ 5 = m - \frac{3}{2} m + 15 \]
From there, you can combine like terms and solve for \( m \). Would you like me to continue solving it?