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LUCIEDU05
Answered

bonjour j’aurais besoin d'aide s'il vous plait merci d’avance
a/ 3x - 7 = 6x + 14

b/ -5x + 2 = 7x - 9

c/ 2x + 6 = -4x - 10

d/ 4x - 8 = 6x + 12

Sagot :

LOULAKAR

Bonjour

a/ 3x - 7 = 6x + 14

-14 - 7 = 6x - 3x

3x = -21

x = -21/3

x = -7

b/ -5x + 2 = 7x - 9

7x + 5x = 2 + 9

12x = 11

x = 11/12

c/ 2x + 6 = -4x - 10

2x + 4x = -10 - 6

6x = -16

x = -16/6

x = -(2 * 8)/(2 * 3)

x = -8/3

d/ 4x - 8 = 6x + 12

6x - 4x = -8 - 12

2x = -20

x = -20/2

x = -10

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