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Sagot :

a. -3 + 1 < x + 1 ≤ 2 + 1
-2 < x+ 1 ≤ 3
b. -3 - 1 < x - 1 ≤ 2 - 1
-4 < x - 1 ≤ 1
c. 2*(-3) < 2x ≤ 4
-6 < 2x ≤ 4
d. -3*(-5) < -5x ≤ -10
15 < -5x ≤ 4
e. -3/2 < x/2 ≤ 1
f. 3 > -x ≥ - 2
g. 3/2 > -x/2 ≥ - 1
h. -6 + 3 < 2x + 3 ≤ 4 + 3
-3 < 2x + 3 ≤ 7

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