bonjour
4 - ( 2 x - 1 ) ≤ 3 ( 4 x + 1 )
4 - 2 x + 1 ≤ 12 x + 3
- 2 x - 12 x ≤ 3 - 4 - 1
- 14 x ≤ - 2
x ≥ 1/7
[ 1/7 : + ∞ [
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bonjour
4 - ( 2 x - 1 ) ≤ 3 ( 4 x + 1 )
4 - 2 x + 1 ≤ 12 x + 3
- 2 x - 12 x ≤ 3 - 4 - 1
- 14 x ≤ - 2
x ≥ 1/7
[ 1/7 : + ∞ [