Question

Tolong bantu ya dengan cara mengerjkannya

Answer 1

4.) -5 |3x-7| + 4 = 14
|3x-7| = 14 - 4 + 5
|3x-7| = 15

3x - 7 = 15
3x = 15 + 7
3x = 22
x = 22/3

atau

-(3x-7) = 15
-3x + 7 = 15
-3x = 15 - 7
-3x = 8
x = -8/3

5.) |2x-1| = |x+3|
(|2x-1|)^2 = (|x+3|)^2
(2x-1)^2 - (x+3)^2 = 0
((2x-1)+(x-3)) ((2x-1)-(x+3)) = 0
(3x-4) (x-4) = 0
3x-4 = 0
3x = 4
x = 4/3

dan

x-4=0
x= 4