Х - число
Х/2 - 1/3Х/2 =2/5
Х/2 - Х/6 = 2/5
(3Х -Х)/6 =2/5
1/3Х = 2/5
Х = 2/5 :1/3= 2/3 х 3/1
Х = 2
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Х - число
Х/2 - 1/3Х/2 =2/5
Х/2 - Х/6 = 2/5
(3Х -Х)/6 =2/5
1/3Х = 2/5
Х = 2/5 :1/3= 2/3 х 3/1
Х = 2