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x in (-oo:+oo)
(1/3)*x-(3/8) < 4 // - 4
(1/3)*x-(3/8)-4 < 0
(1/3)*x-3/8-4 < 0
1/3*x-35/8 < 0 // + 35/8
1/3*x < 35/8 // : 1/3
x < 35/8/1/3
x < 105/8
x in (-oo:105/8)
(-oo:105/8)
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