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AntoGaming11
@AntoGaming11
May 2019
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Bonjour j'ai un éxo de math , et je n'y comprend rien ! Pouvez vous m'aider svp merci c'est sur les équations .
3) p98:
a.3x +5=4
b.7x +8 =14x
c. 5x -3 = 7+5x
merci beacoup
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taalbabachir
Verified answer
A) 3 x + 5 = 4 ⇒ 3 x = 4 - 5 ⇒ 3 x = - 1 ⇒ x = - 1/3
b) 7 x + 8 = 14 x ⇒ 14 x - 7 x = 8 ⇒ 7 x = 8 ⇒ x = 8/7
c) 5 x - 3 = 7 + 5 x l'égalité n'est pas vraie
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loulakar
Verified answer
Bonjour,
Résoudre :
a.3x +5=4
3x + 5 - 5 = 4 - 5
3x = -1
3x/3 = -1/3
x = -1/3
b.7x +8 =14x
7x + 8 - 7x = 14x - 7x
8 = 7x
8/7 = 7x/7
x = 8/7
c. 5x -3 = 7+5x
5x - 5x = 7 + 3
0 = 10
Pas de solution
0 votes
Thanks 0
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Verified answer
A) 3 x + 5 = 4 ⇒ 3 x = 4 - 5 ⇒ 3 x = - 1 ⇒ x = - 1/3b) 7 x + 8 = 14 x ⇒ 14 x - 7 x = 8 ⇒ 7 x = 8 ⇒ x = 8/7
c) 5 x - 3 = 7 + 5 x l'égalité n'est pas vraie
Verified answer
Bonjour,Résoudre :
a.3x +5=4
3x + 5 - 5 = 4 - 5
3x = -1
3x/3 = -1/3
x = -1/3
b.7x +8 =14x
7x + 8 - 7x = 14x - 7x
8 = 7x
8/7 = 7x/7
x = 8/7
c. 5x -3 = 7+5x
5x - 5x = 7 + 3
0 = 10
Pas de solution