5,2(18) = x
52.(18) = 10x
5218.(18) = 1000x
5218.(18) - 52.(18) = 1000x - 10x
5166 = 990x
x = 5166/990 = 574/110 = 287/55
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Verified answer
5,2(18) = x
52.(18) = 10x
5218.(18) = 1000x
5218.(18) - 52.(18) = 1000x - 10x
5166 = 990x
x = 5166/990 = 574/110 = 287/55
так период удаляется
а вы сделайте 1000х-100х и поймете