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⇒ pindahkan 5 menjadi bagi
a + 1 = 10 : 5
a + 1 = 2
⇒ pindahkan 1 menjadi kurang
a = 2 - 1
a = 1
5 x a + 5 x 1 = 10
5a+5 = 10
5a = 10-5
5a = 5
a = 1