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Bilangan 1 = x
Bilangan 2 = y
x +y = 19 ----> x = 19 -y
x -y = 27
x -y = 27
(19 -y) -y = 27
19 -y -y = 27
-2y = 27 -19
-2y = 8
y = 8/-2
y = -4
x = 19 -y
x = 19 -(-4)
x = 19 +4
x = 23
Jadi, bilangan itu secara berturut-turut adalah 23 dan -4.
Itu jawabannya.