To represent how much more Jalen needs to save for the tablet, we can write the equation:
\[ x + 50 = 120 \]
Where \( x \) is the amount Jalen still needs to save.
To isolate \( x \), you can subtract 50 from both sides:
\[ x = 120 - 50 \]
So, Jalen needs to save \( x = 70 \) dollars more for the tablet.
The correct equation is:
\( x + 50 = 120 \)