l'égalité 4(x+5)=4x+20
est-elle vraie pour
x=3

By: USER6666
28 Agustus 2025 mathematiques 5 minutes
4.5
59 views 59 comments 13 shares

Question

Grade: Education Subject: mathematiques
l'égalité 4(x+5)=4x+20
est-elle vraie pour
x=3
Asked by:
59 Viewed 59 Answers

Answer (59)

Best Answer
(175)
On va substituer (remplacer) les x par 3 :
4(3+5) = 4x3 + 20
4x3 + 4x5 = 12 + 20
12 + 20 = 32
32 = 32 
Donc oui l'égalité est vraie pour x=3 !
:)
Answered on 28 Agustus 2025
(195)
Bonsoir ,
4(x+5) = 4x+20
4x+20 = 4x+20
pour x = 3 : 
4(3) +20 = 4(3) +20
12 +20 = 12+20
32 = 32 
* oui l'égalité est vraie 
Voilà :)
Answered on 28 Agustus 2025

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