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maka a : b = 3 : 4
Anggap a = 3x dan b = 4x
maka
a + b = 28
⇒ 3x + 4x = 28
⇒ 7x = 28
⇒ x = 28/7
⇒ x = 4
Maka bilangan terkecil = a
Sehingga
a = 3x
= 3(4)
= 12
Terimakasih semoga membantu