mohon bantuannya kak. Terima kasih.

Kelas 8 Matematika
Bab Kesebangunan

1] DG/DB = FG/AB
8/(8 + x) = 4/7
8 + x = 7 . 8/4
x = 14 - 8
x = 6 cm

2] EG/CD = BG/BD
y/14 = 6/(6 + 8)
y = 6 . 14/14
y = 6 cm

x + y 
= 6 + 6
= 12 cm

Mapel : Matematika
Bab : Kesebangunan dan Kekongruenan

AB/FG = BD/DG
      7/4 = (8 + x) / 8
  7 x 8  = 4( 8 + x)
     56   = 32 + 4x
     4x   = 56 - 32
     4x   = 24
        x  = 24/4
        x  = 6

CD/EG = BD/BG
    14/y  = (8 + 6) / 6
    14/y  = 14/6
         y  = 14 x 6 / 14
         y  = 6

x + y = 6 + 6 
x + y = 12