Hey there!
Answer: [tex] \Rightarrow \boxed{\sf{x = 25}}[/tex]
[tex] \rightarrow \sf{ \frac{x}{20} = \frac{30}{24} }[/tex]
[tex] \rightarrow \: \boxed{ \sf{24x = 600}}[/tex]
[tex] \rightarrow \: \boxed{ \sf{ \frac{24x}{24} = \frac{600}{24}}} [/tex]
[tex] \rightarrow \boxed{ \bold{\sf{ x = 25}}}[/tex]
Hopes this helps