nilai × yang memenuhi | 2× + 4 | = | × - 1 |

| 2x + 4 | = x - 1
hasil (1)
2x + 4 = x-1
2x - x = -1-4
x = -5

atau hasil kedua..
2x + 4 = -x +1
2x + x = 1 -4
3x = -3
x = -1