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4x+2-4x-6>4x+2-3
4x-4x-4x>2-3-2+6
-4x>3 /:4
x<-3/4
prędkość (v)=40km/h
czas(t)=2h
droga(s)=?
s=vt
s=40km/h*2h=80km
v=30km/h
t=?
s=80km
t=s/v
t=80/30 = 2,66h