gan,cara kerjanya ini gimana sih

[tex] \frac{f1}{a1} = \frac{f2}{a2} \\ \frac{25}{10} = \frac{x}{60} \\ 10x = 25 \times 60 \\ 10x = 1500 \\ x = \frac{1500}{10} \\ x = 150 n[/tex]