1. x = -6 atau x = 14
2. x = -5 atau x = 1
3. x = -3.003 atau x = 3.011
4. x = -1 atau = 6
5. x = 2 atau x = 12
–› No. 1
|x - 4| = 10
Untuk x < 10
x - 4 = -10
x = -10 + 4
x = -6
Untuk x ≥ 10
x - 4 = 10
x = 10 + 4
x = 14
HP = {-6, 14}
–› No. 2
|x + 2| = 3
Untuk x < 3
x + 2 = -3
x = -3 - 2
x = -5
Untuk x ≥ 3
x + 2 = 3
x = 3 - 2
x = 1
HP = {-5, 1}
–› No. 3
|x - 4| = 3.007
Untuk x < 3.007
x - 4 = -3.007
x = -3.007 + 4
x = -3.003
Untuk x ≥ 3.007
x - 4 = 3.007
x = 3.007 + 4
x = 3.011
HP = {-3.003, 3.011}
–› No. 4
|2x - 5| = 7
Untuk x < 7
2x - 5 = -7
2x = -7 + 5
2x = -2
x = -2/2
x = -1
Untuk x ≥ 7
2x - 5 = 7
2x = 7 + 5
2x = 12
x = 12/2
x = 6
HP = {-1, 6}
–› No. 5
-3|x - 7| + 2 = -13
-3|x - 7| = -13 - 2
-3|x - 7| = -15
|x - 7| = -15/-3
|x - 7| = 5
Untuk x < 5
x - 7 = -5
x = -5 + 7
x = 2
Untuk x ≥ 5
x - 7 = 5
x = 5 + 7
x = 12
HP = {2, 12}
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1. x = -6 atau x = 14
2. x = -5 atau x = 1
3. x = -3.003 atau x = 3.011
4. x = -1 atau = 6
5. x = 2 atau x = 12
Pembahasan
–› No. 1
|x - 4| = 10
Untuk x < 10
x - 4 = -10
x = -10 + 4
x = -6
Untuk x ≥ 10
x - 4 = 10
x = 10 + 4
x = 14
HP = {-6, 14}
–› No. 2
|x + 2| = 3
Untuk x < 3
x + 2 = -3
x = -3 - 2
x = -5
Untuk x ≥ 3
x + 2 = 3
x = 3 - 2
x = 1
HP = {-5, 1}
–› No. 3
|x - 4| = 3.007
Untuk x < 3.007
x - 4 = -3.007
x = -3.007 + 4
x = -3.003
Untuk x ≥ 3.007
x - 4 = 3.007
x = 3.007 + 4
x = 3.011
HP = {-3.003, 3.011}
–› No. 4
|2x - 5| = 7
Untuk x < 7
2x - 5 = -7
2x = -7 + 5
2x = -2
x = -2/2
x = -1
Untuk x ≥ 7
2x - 5 = 7
2x = 7 + 5
2x = 12
x = 12/2
x = 6
HP = {-1, 6}
–› No. 5
-3|x - 7| + 2 = -13
-3|x - 7| = -13 - 2
-3|x - 7| = -15
|x - 7| = -15/-3
|x - 7| = 5
Untuk x < 5
x - 7 = -5
x = -5 + 7
x = 2
Untuk x ≥ 5
x - 7 = 5
x = 5 + 7
x = 12
HP = {2, 12}