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Exercice 1:
Résoudre les équations suivantes
3x + 2 = x + 6
-8x + 3 = 5x-2
5(x + 1) = -7x - 1

Sagot :

Bonjour,

1)

3× + 2 = x + 6

3x - x = 6 - 2

2x = 4

x = 4/2

x = 2

2)

-8x + 3 = 5x -2

-8x -5x = -2 -3

- 13x = -5

x = -5/-13

x = 5/13

3)

5(x+1) = -7x - 1

5x+ 5= -7x -1

5x + 7x = -1 -5

12x = -6

x = -6/12

J'espère t'avoir aidé :)
1) 3x +2-2=x+6-2
3x=x+4
3x-x = x-x +4
2x=4
2x:2 = 4:2
X=2
2) -8x+3-3=5x-2-3
-8x=5x-5
-8x-5x=5x-5x-5
-13x=-5
-13x:-13=-5:-13
X=5sur13
3) je sais aps desolee