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Bonjour
Exercice: Résoudre les équations suivantes :
1) x + 5 = 4
2) x
- 4 = 6
3) 2x + 12 = 0
4) 4x - 2 = 6
-
5) x = 4 - 2x
6) x = 8 + 3x
7) 2x - 3 = x
8) 8x - 3x + 2 = x + 6
9) x + 5 = 3x + 2
10)
- 3x - 4 =
-x+ 2
Pouvez-vous m’aider svp merci


Répondre :

Bonjour;

1) x + 5 = 4

x= 4-5

x= -1

2) x- 4 = 6

x= 6+4

x=10

3) 2x + 12 = 0

2x = -12

x =-12/2

x=-6

4) 4x - 2 = 6

4x = 6+2

4x = 8

x= 8/4

x = 2

5) x = 4 - 2x

x+2x = 4

3x = 4

x = 4/3

6) x = 8 + 3x

-8 =3x-x

-8 = 2x

x= -8/2

x = -4

7) 2x - 3 = x

2x-x = 3

x = 3

8) 8x - 3x + 2 = x + 6

8x-3x-x = 6-2

4x = 4

x = 4/4

x=1

9) x + 5 = 3x + 2

5-2 = 3x -x

3 = 2x

x= 3/2

10)- 3x - 4 =-x+ 2

-4-2 =-x +3x

-6= 2x

x= -6/2

x=-3

bonjour

[tex]x + 5 = 4 \\x = 4 - 5 \\x = - 1 \\\\x - 4 = 6 \\x = 6 + 4\\x = 10 \\\\2 x + 12 = 0 \\2 x = - 12 \\x = - 6 \\\\x = 4 - 2 x \\x + 2 x = 4 \\3 x = 4 \\x = 4/3 \\\\x = 8 + 3 x \\x - 3 x = 8 \\- 2 x = 8\\x = - 4[/tex]

[tex]2 x - 3 = x \\2x - x = 3 \\x = 3 \\\\8 x - 3 x + 2 = x + 6 \\5 x - x = 6 - 2 \\4 x = 4 \\x = 1 \\\\x + 5 = 3 x + 2\\x - 3 x = 2 - 5 \\- 2 x = - 3 \\x = 3/2 \\\\- 3 x - 4 = - x + 2 \\- 3 x + x = 2 + 4 \\- 2 x = 6 \\x = - 3[/tex]