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x in (-oo:+oo)
(1/4)*x-x-(3/5) < 64 // - 64
(1/4)*x-x-(3/5)-64 < 0
(1/4)*x-x-3/5-64 < 0
-3/4*x-323/5 < 0 // + 323/5
-3/4*x < 323/5 // : -3/4
x > 323/5/(-3/4)
x > -1292/15
x in (-1292/15:+oo)
(-1292/15:+oo)
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