|2x-1|+|x+1|=3
1)x nalezy do(-,-1]
-2x+1-x-1=3
-3x=3
x=-1
2)x nalezy do(-1,1/2]
-2x+1+x+1=3
-x=1
sprzeczne
3)x nalezy do (1/2,)
2x-1+x+1=3
3x=3
x=1
Odp: x=1 lub x = -1
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|2x-1|+|x+1|=3
1)x nalezy do(-,-1]
-2x+1-x-1=3
-3x=3
x=-1
2)x nalezy do(-1,1/2]
-2x+1+x+1=3
-x=1
x=-1
sprzeczne
3)x nalezy do (1/2,)
2x-1+x+1=3
3x=3
x=1
Odp: x=1 lub x = -1