reponse de léquation 7x+3=3x-5, 5+6x=-x-9, 2+3x=7-3x, 7x-(5x-3)=5(x-3)+2, 3(2x+5)=-3(x-4) merci de résoudre ces équations svp c'est pour demain :)

Bonjour,

7x+3=3x-5

7x - 3x = - 5 - 3

4x = - 8

x = - 8/4

x = - 2

5+6x=-x-9

6x + x = - 9 - 5

5x = - 14

x = - 14/5

2+3x=7-3x

3x + 3x = 7 - 2

6x = 5

x = 5/6

7x-(5x-3)=5(x-3)+2

7x - 5x + 3 = 5x - 15 + 2

7x - 5x - 5x = - 15 + 2 - 3

- 3x = - 16

x = 16/3

3(2x+5)=-3(x-4)

6x + 15 = - 3x + 12

6x + 3x = 12 - 15

9x = - 3

x = - 3/9

x = - 1/3.