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x = 0,4444...
Sehingga,
10x = 4,4444...
Didapat:
10x = 4,444...
x = 0,444...
- - - Kurangi - - -
9x = 4
x = 4/9
Sehingga, a = 4, dan b = 9
2a + b = 2(4) + 9
= 8 + 9
= 17