Question

||x+3|+7|=10
|x+3|=3
x+3=3 sau x+3=-3
x=0      x=-6
E bine?
Si cum se rezolva: |2x-1|=|1-x|

Answer 1

x=0 e raspunsul corect si
|2x-1|=|1-x|, 2x-1=1-x, 3x=2, |x|=2/3, deci x={-2/3 si 2/3}

Answer 2

|2x-1|=|1-x|, 2x-1=1-x, 3x=2, |x|=2/3, deci x={-2/3 si 2/3}