Quelqu’un pourrais m’aider svp merci d’avance

Bonjour,

1)

x= 3+5

x= 8

2)

x= 12-8

x= 4

3)

x= 20/4

x= 5

4)

x = -14/2

x = -7

1)

24 -8x +4x -8 = 11

-8x+4x = 11 -24 +8

-4x = -5

x= 5/4

2)

3x +12 = -32 +4x

12+32 = 4x -3x

44 =x

3)

6-9x -4-5x = 0

6 -4 = 9x +5x

2 = 14x

x= 2/14 = 1/7

Réponse:

Bonjour,

1) x-5=3

x=3+5

x=8

2) x+8=12

x=12-8

x=4

3) 4x=20

x=-20/4

4) -2x=14

x=-14/2

1) 8(3-x)+4x-8=11

24-8x+4x-8-11=0

-4x+5=0

-4x=-5

x=5/4

2) 3(x+4)=4(-8+x)

3x+12=-32+4x

3x+12+32-4x=0

-x+44=0

-x=-44

x=44

3) 3(2-3x)-(4+5x)=0

6-9x-4-5x=0

-14x+2=0

-14x=-2

x=2/14