nilai mtlak I3+2xI = I X-2 I

syarat pertama ruas kanan positif
( 3 + 2x ) = ( x- 2 )
3 + 2x = x -2 
2x- x = -2 -3
x = - 5

syarat kedua ruas kanan negatif
( 3 + 2x ) = - ( x-2)
3 + 2x = - x + 2
2x + x = 2- 3
3x = -1
x = -1/3

hp = { -1/3 , -5 }