Tolong bantu aku ya please​

Jawab:

1) |x +3| = 12

x + 3 = 12

x = 12 – 3

x = 8

atau

x + 3 = -12

x = -12 – 3

x = -15

2) |-4| = 4

3) |-3| + |-2|

= 3 + 2

= 5

4) |-12| + 3

= 12 + 3

= 15

5) |x-3| = 10

x – 3 = 10

x = 10 + 3

x = 13

atau

x-3 = -10

x = -10 + 3

x = -7

6) |2x + 1| = 5

2x + 1 = 5

2x = 5 – 1

2x = 4

x = 2

7) 2 |x + 1| = 10

2(x+1) = 10

x+1 = 5

x = 5 – 1

x = 4

atau

2(x+1) = -10

x + 1 = -5

x = -5 – 1

x = -6

8) 2|x – 1| + 3 = 1

2|x – 1| = 1 – 3

2|x – 1| =  -2

 |x – 1| = -1

maka

x – 1 = -1

x = -1 + 1

x = 0

atau

x – 1 = 1

x = 1 + 1

x = 2 ( Tidak memenuhi)

9) |x +4| = 5

x + 4 = 5

x = 5 – 4

x = 1

atau

x + 4 = -5

x = -5 -4

x = -9

10) |x + 2| = |x + 5|

[(x+2) +(x+5)] [(x+2) – (x+5)] = 0

(2x +7 ) (-3) = 0

2x + 7 = 0                   -3 = 0 (Tidak Memenuhi)

2x = -7

x = -7/2