Bonjour je suis bloquée quelqu’un pourrait m’aider svp ? Résoudre les équations. a) -7x + 13 = 0 b) 5 = -2x - 7 c) 3x – 18 = 5x + 3 d) 3(x - 1) - 2(5x - 3) = 7x

Bonjour

Résoudre les équations.

a) -7x + 13 = 0

- 7x = - 13

x = 13/7

b) 5 = -2x - 7

- 2x = 7 + 5

- 2x = 12

x = - 12/2

x = - 6

c) 3x – 18 = 5x + 3

3x - 5x = 18 + 3

- 2x = 21

x = - 21/2

d) 3(x - 1) - 2(5x - 3) = 7x + 2

3x - 3 - 10x + 6 = 7x + 2

3x - 10x - 7x = 2 + 3 - 6

- 14x = - 1

x = 1/14.

Bonjour,

a) -7x + 13 = 0

13 = 7x

x= 13/7

b) 5 = -2x - 7

2x= -7-5

2x= -12

x = -12/2 =-6

c) 3x – 18 = 5x + 3

-18 -3 = 5x-3x

-21 = 2x

x= -21/2 = -10,5

d) 3(x - 1) - 2(5x - 3) = 7x + 2

3x-3 -10x +6 = 7x+2

3x-10x -7x = 2 +3 -6

-14x = -1

x = -1/-14 = 1/14