a = kelinci b = kucing c = anjing a + b = 10 a + c = 20 b + c = 24 total = a + b + c a + c = 20 → a = 20 - c b + c = 24 → b = 24 - c a + b = 10 (20 - c) + (24 - c) = 10 44 - 2c = 10 44 - 10 = 2c 34 = 2c c = 34 / 2 c = 17 total = a + b + c total = (a + b) + c total = 10 + 17 total = 27 k