Mohon bantu jawab no. 7-8 (nilai mutlak).

7. |4-3x| = |-4|, maka
4-3x = -4
-3x = -4-4
-3x = -8
x = -8/-3
x = 8/3

atau

4-3x = 4
-3x = 4-4
-3x = 0
x = -3

8. |2+5x| = 13, maka
2+5x = 13
5x = 13-2
5x = 11
x = 11/5

atau

2+5x = -13
5x = -13-2
5x = -15
x = -15/5
x = -3
.
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maaf kalau salah