3／5÷5／6－3x=1／5
3／5÷5／6－1／5＝3x
3／5×6／5－1／5＝3x
18／25－1／5＝3x
18／25－5／25＝3x
13／25＝3x
13／25÷3＝x
13／25×1／3＝x
x＝13／75
所以X等于七十五分之十三,不知道有没算错,请验算.
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