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Sagot :

MOZI

Bonjour,

9 109/20 220 = 1/5 + 1/4 + 1/x ​

⇔ 1/x = 9 109/20 220 - 1/5 - 1/4

⇔ 1/x = 9 109/20 220 - 9/20

⇔ 1/x = 9 109/20 220 - 9 099/20 220

⇔ 1/x = 10/20 220

⇔ x = 2022

x ∈ IN

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