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x - 5/2 + 8 - 4x < - 75
- 3x < - 75 - 8 + 5/2
- 3x < - 83 + 5/2
- 3x < (- 83 * 2 + 5)/2
- 3x < (- 166 + 5)/2
- 3x < - 161/2
x > - 161/2/-3/1
x > - 161/- 6
x > 161/6
Solución : ]161/6; + ∞[