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2014-06-08T00:33:19-03:00
4x+2 ≤14
4x ≤ 14-2
4x ≤ 12
x ≤ 12/4
x ≤ 3

2(-x+4)> -32
-2x +8 > -32
-2x> -32 -8
-2x > - 40 (.-1)
2x < 40
x < 40/2
x < 20
1 5 1