Bonsoir, pourriez-vous m'aider? Il faut que je résolves les équations suivante: a) 2x - 1 = 0 b) 5x + 3 = 0 c)[tex] \frac{2}{5} [/tex]x - 8 = 0 d) 5x + [tex]

[tex]2x - 1 = 0 2x = 0 + 1 2x = 1 x = 1/2 [/tex]

[tex]5x + 3 = 0 5x = 0 - 3 5x = -3 x = -3/5[/tex]

[tex]2/5x - 8 = 0 2/5x = 0 + 8 2/5x = 8 x = 8 * 5/2 x = 40/2 x = 20[/tex]

[tex]5x + 9/5 = 0 5x = -9/5 x = -9/5 * 1/5 x = -9/25[/tex]

[tex]5/3x + 2/7 = 0 5/3x = -2/7 x = -2/7 * 3/5 x = -6/35[/tex]

Bonsoir,
2x-1= 0
x= 1/2

5x+3=0 
x= -3/5

2x/5-8=0
2x/5= 8
2x= 8*5
x= 40/2
x= 20

5x+9/5= 0
5x= -9/5
5*5x= -9
25x= -9
x= - 9/25

5x/3 + 2/7= 0
5x/3= - 2/7
7*5x= -2*3
35x= -6
x= -6/35

x/2= 0
x= 0