bonsoir
17 x + 40 < 19 x + 30
17 x - 19 x < 30 - 40
- 2 x < - 10
x > 5
] 5 : + ∞ [
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bonsoir
17 x + 40 < 19 x + 30
17 x - 19 x < 30 - 40
- 2 x < - 10
x > 5
] 5 : + ∞ [