Bonjours pouvez-vous m'aidez s'il vous plait b. 3 (x - 2) =6 (x + 4) c. 7x - (5x + 3) = 5 (x - 3) + 2

Bonjour !

b)

3(x-2) = 6(x+4)

<=> 3*x-3*2 = 6*x+6*4

<=> 3x - 6 = 6x+24

<=> 6x-3x = -24 - 6

<=> 3x = -30

<=> x = -30/3 = -10

c)

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

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

<=> 2x - 3 = 5x - 13

<=> 5x - 2x = 13 - 3

<=> 3x = 10

<=> x = 10/3

Voilà !