The triangles are similar, solve for n.

Answer:
N=24
Step-by-step explanation:
The red side needs to be multiplied by 5/4 to get a blue number so you need to divide 30 by 4/5 to get N
Answer:
[tex]\frac{ZY}{QR} = \frac{ZX}{RP} \\ \frac{15}{12 } = \frac{30}{n} \\ n = 24[/tex]