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1)
13 - 2(X+1) = 5 --> 13 - 2X - 2 = 5 --> 13 - 2 - 5 = 2X --> 6 = 2X --> X = 3.
2)
(8X - 6) / 2 = 3X - (6 - 2X) + 7 --> 4X - 3 = 3X - 6 + 2X + 7 -->
--> 4X - 3X - 2X = -6 + 7 + 3 --> -X = 4 --> X = -4.
3)
-6X = -24 + 2X --> -6X - 2X = -24 --> -8X = -24 --> X = -24/-8 --> X = 3.
4)
-2(X + 3) < -10 --> divido entre 2:
-(X + 3) < -5 --> -X - 3 < -5 --> Le sumo X:
-3 < -5 + X --> Le sumo 5:
2 < X.
5)
9X + 5 > 5X - 11 --> Le sumo -5X:
4X + 5 > -11 --> Le sumo -5:
4X > -16 --> divido entre 4:
X > -4.