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→ Eliminasi
a + b = 6
a - b = 24
_________-
2b = -18
b = -9
a + b = 6
a + (-9) = 6
a = 6 + 9
a = 15
jadi bilangan tersebut yaitu
a = 15 dan b = -9
x - y = 24
————— (-)
2y = -18
y = -9
x = 6 - (-9)
x = 15