Tolong Bantu jawab donkk.

Keliling Segitiga :
K = a + b + c
K = (2x - 5) + (3x + 6) + (x + 6)
K = 2x - 5 + 3x + 6 + x + 6
K = 2x + 3x + x - 5 + 6 + 6
K = 6x + 7 cm

Maaf Kalau Salah