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I2x+4I=4//-4
I2xI=0
x=0
|2x+4|+1=5 lub |2x+4|-1=5
|2x+4|=4 lub |2x+4|=6
2x+4=4 2x-4=4 2x+4=6 2x-4=6
2x=0 2x=8 2x=2 2x=10
x=0 x=4 x=1 x=5