tolong bantu jawab dengan caranya ya

1.
[tex] \frac{8}{16} = \frac{3}{x} \\ x = \frac{3 \times 16}{8} \\ x = 6cm[/tex]
7
[tex] \frac{9}{12} = \frac{6}{de} \\ de = \frac{6 \times 12}{9} \\de = 8cm[/tex]