Tanya klo |7 - 2x| = 1 itu [tex] \frac{ - b}{a} [/tex] nya berapa ? 2/7 apa 7/2 ?

No. 1
|5 - x| = 7
(i)
5 - x = 7
x = 5 - 7
x = -2
(ii)
5 - x = -7
x = 5 + 7
x = 12
HP = {-2 , 12}

No. 2
|3x - 4| = 5
(i)
3x - 4 = 5
3x = 4 + 5
3x = 9
x = 3
(ii)
3x - 4 = -5
3x = 4 - 5
3x = -1
x = -1/3
HP = {-1/3 , 3}

No.4
|7 - 2x| = 1
(i)
7 - 2x = 1
2x = 7 - 1
2x = 6
x = 3
(ii)
7 - 2x = -1
2x = 7 + 1
2x = 8
x = 4
HP = {3 , 4}