Help meee plzzz thxxxx

Answer:
0.125"
Step-by-step explanation:
You'd create a proportion. First, you'd put 3 over x (or whichever variable) and 120 over 5. Like this:
[tex]\frac{3}{x} = \frac{120}{5}[/tex]
then write an equation, which is 120x=3x5
120x=15
and then divide and you get 0.125