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Sagot :

STELLAPHILIPPE2

Explications étape par étape :

    6 (x - 15 ) = 93

⇔ 6x - 90 = 93

⇔ 6x = 93 + 90

⇔ 6x = 183

⇔ x = 183/6

⇔ x = 61/2

    6x = 93

⇔ x = 93/6

⇔ x = 31/2

    6 + x = 93 - 15

⇔ x = 93 - 15 - 6

⇔ x = 72

    6x - 15 = 93

⇔ 6x = 93 + 15

⇔ 6x = 108

⇔ x = 108 / 6

⇔ x = 18

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