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-15>2x-3x
-15>-1x
x<15
b)5<x+3,5
-x<-1,5
x>1,5
c)-5(1-x)≥5
-5+5x≥5
5x≥0
równanie sprzeczne
d)(x-2) - 4(3-x)≥6
x-2-12+4x≥6
x-10≥6
x≥16
3x-2x>15
x>15
b)5<x+3,5
-x<3,5-5
-x<-1,5/(-)
x>1,5
c)-5(1-x)≥5
-5+5x≥5
5x≥5+5/5
x≥2
d)(x-2)-4(3-x)≥6
x-2-12+4x≥6
5x≥6+2+12
5x≥20/5
x≥4