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a + 2b = 7 ...(i)
U9 = 19
a + 8b = 19 ...(ii)
Eliminasikan pers(i) dan (ii) maka diperoleh
-6b = -12
b = 2
Maka, a = 3
Jadi, U27 = a + 26b = 3 + 52 = 55
a+2b = 7
(dieliminasi)
~> 6b=12
~> b=2
(masukin ke persamaan di atas)
~> a+2(2) = 7
~> a+4 = 7
~> a=3
u27= a +26b
~> 3+26(2)
~> 3+52
~> 55