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Sagot :

ANASAG

Réponse:

a) -4x +7 ≥ 11

-4x ≥ 11 -7

-4x ≥ 4

-4x/-4 ≥ 4/-4

x ≥ -1

b) 3x +7 ≤ 5x -4

3x -5x ≤ -4-7

-2x ≤ -11

-2x/-2 ≤ -11/-2

x ≤ 11/2

c) 2(3x -5) -3(-x+1) > 2

2×3x -2×5 +3×x -3×1 > 2

6x -10 +3x -3 > 2

9x -13 > 2

9x > 2+13

9x > 15

9x/9 > 15/9

x > 15/9

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