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x in (-oo:+oo)
(-3/10)*((1/6)*x-5) > 61/40 // - 61/40
(-3/10)*((1/6)*x-5)-(61/40) > 0
(-3/10)*((1/6)*x-5)-61/40 > 0
-3/10*(1/6*x-5)-61/40 > 0
(-3/10*40*(1/6*x-5))/40-61/40 > 0
-3/10*40*(1/6*x-5)-61 > 0
-2*x-1 > 0
(-2*x-1)/40 > 0
(-2*x-1)/40 > 0 // * 40^2
40*(-2*x-1) > 0
( -2*x-1 )
-2*x-1 > 0 // + 1
-2*x > 1 // : -2
x < 1/(-2)
x < -1/2
( 40 )
40 > 0
x należy do R
(-oo:-1/2) (-1/2:+oo) -2*x-1 + - 40 + +
x in (-oo:-1/2)
(-oo:-1/2)
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