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x in (-oo:+oo)
x/7-3 > -5 // + 5
x/7-3+5 > 0
1/7*x+2 > 0 // - 2
1/7*x > -2 // : 1/7
x > -2/1/7
x > -14
x in (-14:+oo)
(-14:+oo)
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