1. lx-1l=6 2. l4x+3l=7 3. lx+1l=l2x-3l 4. l2x+5l=lx+2l Tolong dibantu ya??

Materi : Persamaan Mutlak

Pembahasan :
|x - 1| = 6

x - 1 = 6
x = 6 + 1
x = 7

x - 1 = -6
x = -6 + 1
x = -5

Hp : {-5 , 7}

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|4x + 3| = 7

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

4x + 3 = -7
4x = -7 - 3
4x = -10
x = -5/2

Hp : {-5/2 , 1}

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|x + 1| = |2x - 3|

x + 1 = 2x - 3
2x - x = 1 + 3
x = 4

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

Hp : {2/3 , 4}

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|2x + 5| = |x + 2|

2x + 5 = x + 2
2x - x = 2- 5
x = -3

2x + 5 = -(x + 2)
2x + 5 = -x - 2
2x + x = -2 - 5
3x = -7
x = -7/3

Hp : {-3 , -7/3}