quelques équations : -x/2+5=-3, x/4+4=1/4, -2x/5=5/6 et 1=5x/2-2/3 merci aux courageux

-x/2+5=-3
-x/2=-3-5
-x/2=-8
-x=-16
x=16

x/4+4=1/4
x/4=1/4-4
x/4=1/4-16/4
x/4=(1-16)/4
x=-15
-2x/5=5/6
-2x=25/6
-12x=25
x=-25/12
1=5x/2-2/31+2/3=5x/2
5x=2+4/3
5x=6+4)/3
5x=10/3
x=2/3

Bonsoir,

- x/2 + 5 = - 3
- x/2 + 10/2 = - 6/2
- x = - 6 - 10
x = 16

x/4 + 4 = 1/4
x/4 + 16/4 = 1/4
x = 1 - 16
x = - 15

- 2x/5 = 5/6
- 12/60x = 25/30
- 12x = 25
x = - 25/12

1 = 5x/2 - 2/3
6/6 = 15/6x - 4/6
15x = 4 - 6
15x = - 1
x = - 1/15