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Sagot :

Bonsoir,

a) 5x = 3

⇒ x = 3/5

b) 5 + x = 3

⇒ x = 3 - 5

⇒ x = -2

c) 7x - 4 = 5x + 10

⇒ 7x - 5x = 10 + 4

⇒ 2x = 14

⇒ x = 14/2

⇒ x = 7

d) 10 + 2x = 0

⇒ 2x = -10

⇒ x = -10/2

⇒ x = -5

e) (10+2x)+(8-x) = 0

⇒ 18 - x = 0

⇒ x = 18

f) -3x = 9

⇒ x = 9/(-3)

⇒ x = -3

LANGLOISJEANNE1
a) 5x = 3 = x = 3/5
b) 5 + x = 3 = x = 3 - 5 = x = -2
c) 7x - 4 = 5x + 10 = 7x - 5x = 10 +4 = 2x = 14 = x = 14/2 = x = 7
d) 10 + 2x = 0 = 2x = -10 = x = -10/2 = x = -5
e) (10 + 2x) + (8-x) = 0 = 18 - x = 0 = x = 18 f) -3x = 9 = x = 9 / (- 3) = x = -3

Voilà j’espère t’avoir aidée je l’ai corrigé avec ma profs de maths le mois dernier bonne soirée

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