tolong dong nomor 2 yang a sama b aja Pake cara yaa

|x - 3/4| = 1/2

(i)
x - 3/4 = 1/2
x = 1/2 + 3/4
x = 2/4 + 3/4
x = 5/4

atau

 (ii)
x - 3/4 = - 1/2
x = -1/2 + 3/4
x = -2/4 + 3/4
x = 1/4

jadi HP : {1/4 , 5/4}


b. 
|3x + 7| = 1

  (i)
3x + 7 = 1
3x = 1 - 7
3x = -6
x = -6/3
x = -2

atau

  (ii)
3x + 7 = -1
3x = -1 - 7
3x = -8
x = -8/3

jadi HP : {-8/3 , -2}