The answer to your question is x = 18
Step-by-step explanation:
Use this problem using proportions
                 ![\frac{QR}{LM} = \frac{RT}{MO}](/tpl/images/0421/3698/19ab0.png)
Substitution
                 ![\frac{x}{30} = \frac{9}{15}](/tpl/images/0421/3698/ff4eb.png)
Solve for "x"
                 x = ![(30) \frac{9}{15}](/tpl/images/0421/3698/393db.png)
Simplification
                 x = ![\frac{270}{15}](/tpl/images/0421/3698/12e14.png)
                 x = 18