tentukan nilai X yang memenuhi persamaan berikut: a.l2x-11l=7 b.l(4x-8)l=0

a.
|2x - 11| = 7
(i)
2x - 11 = 7
2x = 7 + 11
2x = 18
x = 9
(ii)
2x - 11 = -7
2x = -7 + 11
2x = 4
x = 2
HP = {2,9}

b.
|4x - 8| = 0
4x - 8 = 0
4x = 8
x = 8/4
x = 2
HP = {2}

jawabannya :

a) |2x-11| = 7
• 2x-11 = 7
2x = 11+7
2x = 18
x = 9

• 2x-11 = -7
2x = -7+11
2x = 4
x = 2

Hp = {9,2}

b) |4x-8| = 0
• 4x-8 = 0
4x = 8
x = 8/4
x = 2
Hp = {2}

semoga membantu.....