Bonjour,
(7x + 3) / 15 ≥ 2/5
7x + 3 ≥ 2 × 15/5
7x + 3 ≥ 6
7x ≥ 3
x ≥ 3/7
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Bonjour,
(7x + 3) / 15 ≥ 2/5
7x + 3 ≥ 2 × 15/5
7x + 3 ≥ 6
7x ≥ 3
x ≥ 3/7