1) 2x < 7x +9+4
2x +7x < 9+4
9x <13
x<13-9
x< 4
2 ) -3x signe 4x +29+6
-3x+4x signe 29+6
x signe 35
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1) 2x < 7x +9+4
2x +7x < 9+4
9x <13
x<13-9
x< 4
2 ) -3x signe 4x +29+6
-3x+4x signe 29+6
x signe 35