3,2/4,6 =32/46=16/23
165/2,25 =16500/225=660/9=220/3
3,09/2,5=309/250
58,6/45=586/450=293/225
0,005/0,009 =5/9
a) 6/(x -2) apartine lui n
x=4 6/(x -2) =6/(4-2)=3
b ) 7/(x-2) apartine lui z
x-2=-1 x=1 7/(x-2)=7/(1-2)=7/-1=-7
x-2=1 x=3 7/(x-2)=7/(1-2)=7/1=7
x-2=7 x=9 7/(x-2)=7/(9-2)=7/1=1
x-2=-7 x=-5 7/(x-2)=7/(-5-2)=7/1=1
c) 6/(x-2) apartine lui z
x-2=6 x=8 6/(x-2) =6/(8-2)=6/6=1
x-2=-6 x=-4 6/(x-2) =6/(-4-2)=6/-6=-1
x-2=1 x=3 6/(x-2) =6/(3-2)=6/1=6
x-2=-1 x=1 6/(x-2) =6/(1-2)=6/-1=-6
d) 8/(x-4) apartine lui n
x-4=8 x=12 8/(x-4) =8/(12-4)=8/8=1
x-4=4 x=8 8/(x-4) =8/(8-4)=8/4=2