tentukan nilai mutlak dari 1. |x| + |x-2| + |x-4| = 6 2. |2x+4| - |3-x| = - 1 3. |x-1| + |2x| + |3x+1| =6

1. |x| + |x-2| + |x-4|=6
x + x-2 + x-4 = 6
x+x+x = 6 + 4 + 2
3x = 12
x = 12 : 3
x = 4
2. |2x+4| - |3-x| = -1
2x + 4 - 3 - x = -1
2x -x = -1 -4 + 3
x = -5 + 3
x = -2