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Mae832
@Mae832
May 2019
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Bonjour! Est ce que quelqu'un pourrait m'aider svp?!
Maths: "parmi les énoncés suivants, lesquels sont vrais, quel que soit le nombre x ? Justifiez.
A) si 4x +5 =2x + 6 alors 4x = 2x +1
B)si 4x -7=2x +11 alors 4x =2x + 18
C)si 5x - 1 =3x +2 alors 2x - 1 = 2
D) si 6x + 11 = -2x+5 alors 8x +11 =5
Merci d'avance!
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supersong
Verified answer
Bonjour,
A)
si 4x +5 =2x + 6
4x = 2x + 6 - 5
4x = 2x + 1
Juste
B)
si 4x -7=2x +11
4x = 2x + 11 + 7
4x = 2x + 18
Juste
C)
si 5x - 1 =3x +2
5x - 3x - 1 = 2
2x - 1 = 2
Juste
D)
6x + 11 = -2x+5
6x + 2x + 11 = 5
8x + 11 = 5
Juste
0 votes
Thanks 1
nonotata
Bonsoir
A) si 4x +5 =2x + 6 alors 4x = 2x +1 vrai
4x = 2x+6 -5
4x = 2x+1
B)si 4x -7=2x +11 alors 4x =2x + 18 vrai
4x = 2x+11+7
4x = 2x+18
C)si 5x - 1 =3x +2 alors 2x - 1 = 2 vrai
5x-3x -1 = 2
2x-1 =2
D) si 6x + 11 = -2x+5 alors 8x +11 =5 vrai
6x+11+2x =5
8x+11 = 5
0 votes
Thanks 1
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mae832
January 2021 | 0 Respostas
bonjouur quelqu'un pourrait m'aider svppp merci!
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Mae832
May 2019 | 0 Respostas
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Lista de comentários
Verified answer
Bonjour,A)
si 4x +5 =2x + 6
4x = 2x + 6 - 5
4x = 2x + 1
Juste
B)
si 4x -7=2x +11
4x = 2x + 11 + 7
4x = 2x + 18
Juste
C)
si 5x - 1 =3x +2
5x - 3x - 1 = 2
2x - 1 = 2
Juste
D)
6x + 11 = -2x+5
6x + 2x + 11 = 5
8x + 11 = 5
Juste
A) si 4x +5 =2x + 6 alors 4x = 2x +1 vrai
4x = 2x+6 -5
4x = 2x+1
B)si 4x -7=2x +11 alors 4x =2x + 18 vrai
4x = 2x+11+7
4x = 2x+18
C)si 5x - 1 =3x +2 alors 2x - 1 = 2 vrai
5x-3x -1 = 2
2x-1 =2
D) si 6x + 11 = -2x+5 alors 8x +11 =5 vrai
6x+11+2x =5
8x+11 = 5