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x in (-oo:+oo)
x/(-4)-5.7 < 1 // - 1
x/(-4)-5.7-1 < 0
-1/4*x-6.7 < 0 // + 6.7
-1/4*x < 6.7 // : -1/4
x > 6.7/(-1/4)
x > -26.8
x in (-26.8:+oo)
(-26.8:+oo)
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