1)|x|+|x+3|=5 Jawab: 2)|7x-4|=3 Jawab:

Mapel : Matematika
Kelas : X SMA
Bab : Mutlak

Pembahasan :
|x| + |x + 3| = 5

x + x + 3 = 5
2x + 3 = 5
2x = 2
x = 1

x + x + 3 = -5
2x + 3 = -5
2x = -8
x = -4

Hp : {-4 , 1}

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|7x - 4| = 3

7x - 4 = 3
7x = 7
x = 1

7x - 4 = -3
7x = 1
x = 1/7

Hp : {1/7 , 1}