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27 = U1 + U2 + U3
27 = a + a + 1 + a + 2
27 = 3a + 3
27 - 3 = 3a
24 = 3a
24 :3 = a
8 =a
U1 = a = 8
U2 = a + 1 = 8 + 1 = 9
U3 = a + 2 = 8 + 2 = 10
Bilangan 1 = x
Bilangan 2 = x +1
Bilangan 3 = x +2
Sehingga :
x +(x +1) +(x +2) = 27
x +x +1 +x +42 = 27
x +x +x +1 +2 = 27
3x +3 = 27
3x = 27 -3
3x = 24
x = 24/3
x = 8
Bilangan 1 = 8
Bilangan 2 = x +1
= 8 +1
= 9
Bilangan 3 = x +2
= 8 +2
= 10
Jadi, bilangan-bilangan itu secara berurut adalah 8, 9, dan 10.