b) |2x-1|=5 => 2x-1 poate fi 5 sau -5
2x-1=5 => 2x=5+1=6 => x=6÷2=3
2x-1=-5 => 2x=-5+1=-4 => x=-4÷2=-2
c) [tex] | \frac{2x + 1}{3} | = 1[/tex] => [tex] \frac{2x + 1}{3} [/tex] poate fi 1 sau -1
[tex] \frac{2x - 1}{3} =1[/tex] => 2x-1=1×3=3 => 2x=3+1=4 => x=4÷2=2
[tex] \frac{2x - 1}{3} = - 1[/tex] => 2x-1=-1×3=-3 => 2x=-3+1=-2 => x=-2÷2=-1
Sper ca te-am ajutat!
