[PLEASE HELP] Two similar polygons are shown. Find the values of 'X' and 'y'.

Given RST similar to UVT
This means the corresponding sides are proportional to each other.
Thus, we can write ratios and solve for the variables.
First,
12 corresponds to 4
x corresponds to 6
We can write a ratio and solve for x:
[tex]\begin{gathered} \frac{12}{4}=\frac{x}{6} \\ 4x=6\times12 \\ 4x=72 \\ x=18 \end{gathered}[/tex]Similarly, we can say:
12 corresponds to 4
y corresponds to 9
We can write a ratio and solve for y:
[tex]\begin{gathered} \frac{12}{4}=\frac{y}{9} \\ 4y=9\times12 \\ 4y=108 \\ y=27 \end{gathered}[/tex]