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Sagot :

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bonjour

3 x + 111 = 180

⇔ 3 x = 180 - 111

⇔ 3 x = 69

⇔ x = 23

x = 23 ° donc 2  x = 46 °

8 x - 2.5 x > 363

5.5 x > 363

⇔ x > 66

52 - 12  = 40

côté = 20 cm

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