membahas |x-1| + |x-4| = 6

|x - 1| + |x - 4| = 6
x - 1 + x - 4 = 6
2x - 5 = 6
2x = 6 + 5
2x = 11
x = 11/2

-(|x - 1| + |x - 4|) = 6
|x - 1| + |x - 4| = 6/-1
x - 1 + x - 4 = -6
2x - 5 = -6
2x = -6 + 5
2x = -1
x = -1/2

Jadi HPnya adalah {-1/2 , 11/2}