Question

[3x+2]=2x+1 partea intraga

Answer 1

[3x+2] ≤ 3x+2 < [3x+2] +1

2x+1≤ 3x+2<2x+1+1

1-2≤ 3x-2x⇒ -1≤x
3x-2x< 2-2⇒ x<0
-1≤x<0⇒ x=-1

Answer 2

$3x+2-2x-1=0$
$x+1=0$
$x=0-1$
$x=-1$