Răspuns:
Explicație pas cu pas:
a) |x-2|=|2x-4| <=> a) |x-2| = 2·|x-2| <=> 2·|x-2| - Ix-2I = 0 =>
Ix-2I = 0 => x - 2 = 0 => x = 2
=> -x +2 = 0 => x = 2
b) |x-2|+3|x-2|=12 <=>
Ix-2I ·(1+3) = 12 <=>
4· Ix-2I = 12 I:4 =>
Ix-2I = 3 => x - 2 = 3 => x =3+2 => x = 5
=> -x+2 = 3 => x = 2-3 => x = -1