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x in (-oo:+oo)
x/3-5 > 10 // - 10
x/3-10-5 > 0
1/3*x-15 > 0 // + 15
1/3*x > 15 // : 1/3
x > 15/1/3
x > 45
x in (45:+oo)
(45:+oo)
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