Explicație pas cu pas:
|2x+3|-4|2-(2x+5)|=-27 =>
|2x+3|-4|2-2x-5|=-27 =>
|2x+3|-4|-2x-3|=-27 =>
|2x+3|-4|-(2x+3)|=-27
Stim ca |x|=|-x| deci |-(2x+3)|=|2x+3|
|2x+3|-4|2x+3|=-27 =>
-3|2x+3|=-27 => |2x+3|=9
=> 2x+3=9 => 2x=6 => x=3
sau
2x+3=-9 => 2x=-12 => x=-6
x€{3,-6}
