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x=5½
|2x-8|=8/+8
2x=16/ /2
x=8
|x+1,4|-8,4≤0
x-7≤0
x>_-7
mamy więc:
x-3=2½ lub x-3=-2½
x=5½ lub x=½
b) |2x-8|=8
2x-8=8 lub 2x-8=-8
2x=16 lub 2x=0
x=8 lub x=0
c) |x+1,4|-8,4≤0
|x+1,4|≤8,4
x+1,4≤8,4 i x+1,4≥-8,4
x≤7 i x≥-9,8
x∋<-9,8;7>