RESOLUCIÓN:
[tex]AC = 30 \\ 5k = 30 \\ k = \frac{30}{5} \\ k = 6[/tex]
[tex]BC = 2x \\ 3k = 2x \\ 3 \times 6 = 2x \\ 18 = 2x \\ \frac{18}{2} = x \\ 9 = x[/tex]
