To isolate the x terms on the left side of the equation \( x = -24x + 50 \), you should add \( 24x \) to both sides. This will eliminate the \( -24x \) on the right side and combine it with the \( x \) on the left side.
So the correct move is:
Add \( 24x \) to both sides.
This will give you:
\[ x + 24x = 50 \]
Which simplifies to:
\[ 25x = 50 \]