Perhatikan gambar berikut,tolong dibuat jalannya yh.Mkasih

6/(6 + 3) = x/(x + 4)
6/9 = x/(x + 4)
⅔ = x/(x + 4)
⅔(x + 4) = x
2(x + 4) = 3x
2x + 8 = 3x
8 = x

6/(6 + 3) = y/12
6/9 = y/12
⅔ = y/12
⅔ × 12 = y
2 × 4 = y
8 = y

x + y = 8 + 8 = 16