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x-13=-1 v x-13=1
x=12 v x=14
b)I12+3xI=6
12+3x=-6 v 12+3x=6
3x=-15 v 3x=-6
x=-5 v x=-2
c)I2x+3I=I5I
2x+3=5
2x=2
x=1
d)5-Ix-3I=4
1=Ix-3I
x-3=1 v x-3=-1
x=4 v x=2
e)4-Ix-3I=5
-1=Ix-3I
sprzeczne brak rozw
f) Ix+4I≤7
-7≤x+4 ∧x+4≤7
x≥-11 ∧x≤3
x∈<-11,3>
g)I5-xI>0
5-x≠0
x≠5
x∈R\{5}
h)2-Ix+5I≥0
Ix+5I≤2
-2≤x+5 ∧x+5≤2
x≥-7 ∧x≤-3
x∈<-7,3>
x-13=-1 v x-13=1
x=12 v x=14
b)I12+3xI=6
12+3x=-6 v 12+3x=6
3x=-15 v 3x=-6
x=-5 v x=-2
c)I2x+3I=I5I
2x+3=5
2x=2
x=1
d)5-Ix-3I=4
1=Ix-3I
x-3=1 v x-3=-1
x=4 v x=2
e)4-Ix-3I=5
-1=Ix-3I
nie ma rozwiazania
f) Ix+4I≤7
-7≤x+4 ∧x+4≤7
x≥-11 ∧x≤3
x∈<-11,3>
g)I5-xI>0
5-x≠0
x≠5
x∈R\{5}
h)2-Ix+5I≥0
Ix+5I≤2
-2≤x+5 ∧x+5≤2
x≥-7 ∧x≤-3
x∈<-7,3>