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x in (-oo:+oo)
(2*x-5)/3 < 1/5 // - 1/5
(2*x-5)/3-(1/5) < 0
(2*x-5)/3-1/5 < 0
(5*(2*x-5))/(3*5)+(-1*3)/(3*5) < 0
5*(2*x-5)-1*3 < 0
10*x-28 < 0
(10*x-28)/(3*5) < 0
(10*x-28)/(3*5) < 0 // * (3*5)^2
3*5*(10*x-28) < 0
( 10*x-28 )
10*x-28 < 0 // + 28
10*x < 28 // : 10
x < 28/10
x < 14/5
( 3 )
3 < 0
x belongs to the empty set
( 5 )
5 < 0
x belongs to the empty set
(-oo:14/5) (14/5:+oo) 10*x-28 - + 3 + + 5 + +
x in (-oo:14/5)
(-oo:14/5)
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