Tolong jawab no 8 dong pake cara

[tex] \frac{fg}{ab} = \frac{dg}{db} \\ \frac{4}{7} = \frac{8}{8 + x} \\ 4 (8 + x) = 7 \times 8 \\ 32 + 4x = 56 \\ 4x = 56 - 32 \\ 4x = 24 \\ x = \frac{24}{4} \\ x = 6 \: cm\\ \\ \frac{eg}{cd} = \frac{bg}{bd} \\ \frac{y}{14} = \frac{6}{14} \\ y \times 14 = 6 \times 14 \\ 14y = 84 \\ y = \frac{84}{14} \\ y = 6 \: cm[/tex]
Diperoleh GB = x = 6 cm
dan BD = GB + GD = 6 + 8 = 14 cm
GE = y = 6 cm
maka nilai x + y = 6 + 6 = 12 cm
jawaban C.