Bonjour j'arrive pas a faire mes devoir en maths aidez moi svp

résoudre les equations suivantes:
2x+1=7
3x+2=5
-2x+4=16
Svp

By: USER5423
25 Agustus 2025 mathematiques 5 minutes
4.5
160 views 160 comments 13 shares
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Question

Grade: Education Subject: mathematiques
Bonjour j'arrive pas a faire mes devoir en maths aidez moi svp

résoudre les equations suivantes:
2x+1=7
3x+2=5
-2x+4=16
Svp
Asked by:
160 Viewed 160 Answers

Answer (160)

Best Answer
(269)
Bonjour ;

2x+1=7
donc 2x+1-1=7-1
donc 2x=6
donc x=6/2=3

3x+2=5
donc 3x+2-2=5-2
donc 3x=3
donc x=3/3=1


-2x+4=16
donc -2x+4-4=16-4
donc -2x=12
donc x=12/(-2)=-6

Answered on 25 Agustus 2025
(160)
Bonjour

2x=7-1
x=6/2
x= 3    S={3}

3x=5-2
x=3/3
x= 1    S={1}

-2x=16-4
x= -12/2
x= - 6     S={-6}
Answered on 25 Agustus 2025

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