ada tiga kelinci masing masing bertanya p kg, q kg dan r kg. Jika p+q =8, p+r= 6,q+r=4, maka p+q+r =

p + q = 8
p = 8 - q

p + r = 6
8 - q + r = 6
- q + r = 6 - 8
- q + r = - 2

q + r = 4
-q + r = - 2
---------------(+)
2r = 2
r = 1

q + r = 4
q + 1 = 4
q = 4 - 1
q = 3

p + r = 6
p + 1 = 6
p = 6 - 1
p = 5

p + q + r
= 5 + 3 + 1
= 9 kg