Resposta :
2x - 1 >= 3
2x >= 4
x >= 2
2x - 1 >= - 3
2x .>= - 2
x >= - 1
- 1 =< x =< 2
| 2x - 1| >= 3
2x - 1 >= 3
2x >= 3 + 1
2x >= 4
x >= 4/2
x >= 2
2x - 1 >= - 3
2x >= -3 + 1
2x >= - 2
x >= -2/2
x >= - 1
logo:
S = { - 1 =< x >= 2 }
2x - 1 >= 3
2x >= 3 + 1
2x >= 4
x >= 4/2
x >= 2
2x - 1 >= - 3
2x >= -3 + 1
2x >= - 2
x >= -2/2
x >= - 1
logo:
S = { - 1 =< x >= 2 }