Hello, résoudre les équations: A = 2x - 3 = 7 + 6x B = 3x - 7 + 5x = 8x + 5 C = 2x - 3 = 8x + 4

Bonjour,

Résoudre les équations :

A = 2x - 3 = 7 + 6x

2x - 6x = 7 + 3

- 4x = 10

x = - 10/4

x = - 5/2

B = 3x - 7 + 5x = 8x + 5

3x + 5x - 8x = 5 + 7

0x = 12 --> Impossible

C = 2x - 3 = 8x + 4

2x - 8x = 4 + 3

- 6x = 7

x = - 7/6.

Hello !

A = 2x - 3 = 7 + 6x

A = 2x - 6x = 7 + 3

A = -4x = 10

x = 10/-4 = -2,5

B = 3x - 7 + 5x = 8x + 5

B = 3x + 5x - 8x = 5 + 7

B = 8x - 8x = 12

B = 0x = 12 --> impossible à résoudre

C = 2x - 3 = 8x + 4

C = 2x - 8x = 4 + 3

C = -6x = 7

x = 7/-6