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Sagot :

Réponse :

a) x + 4 = 12

⇔ x = 12 - 4

⇔ x = 8

d) -14 = 2x

⇔ -14/2 = x

⇔ -7 = x

e) 5 = 4x

⇔ 5/4 = x

VINS

[tex]bonsoir\\\\\\x + 4 = 12x = 12 - 4\\x = 8 \\\\- 2 x = 14 \\x = - 7 \\\\\\- 4 x = - 5 \\x = 5/4 \\\\[/tex]

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