(E7): 2x + 5 = x -3/4 (E10): 2x+5/2 = 5(2x - 3) Bonjour merci pour votre aide ​

Bonjour,

2x + 5 = x - 3/4

2x - x = -3/4 - 5

x = -3/4 - 20/4

x = -23/4

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

2x + 5/2 = 10x - 15

2x - 10x = -15 - 5/2

-8x = -30/2 - 5/2

-8x = -35/2

-16/2x = -35/2

-16x = -35

x = -35 / -16 = 35/16