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Sagot :

-2x < 0
donc x > 0

8x-4 [tex] \geq [/tex] 13x-8
-5x  [tex] \geq [/tex] -4
x [tex] \leq [/tex] 0,8

7-(3x-2) [tex] \leq [/tex] 3(2x-4) -5x
-3x+9 [tex] \leq [/tex] x-12
4x [tex] \leq [/tex] -21
x [tex] \leq [/tex] -5,25

x(x-1) < x(3+x)
x²-x < x²+3x
-4x < 0
x > 0

-2x+5 [tex] \geq [/tex] 2(3-x)
-2x+5 [tex] \leq [/tex] -2x+6
5 [tex] \leq [/tex] 6
impossible donc S={}








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