Answer
$F_h = 5.0~N$
Work Step by Step
To find $F_h$, we can consider the horizontal forces:
$F_{net,x} = 0$
$F_h-F_3 = 0$
$F_h = F_3$
$F_h = 5.0~N$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.