Bonjour, exercice de Mathematiques 3eme Résoudre les equations suivante 2x+1/3=x-4/3 5x-2/8=x+3/2 -9x+6/3=4x-8/4 3x-7/5=2x+1/2 Merci d'avance

Bonjour,

5x-2/8=x+3/2
5x - 1/4 = x + 3/2
20/4x - 1/4 = 4/4x + 6/4
20/4x - 4/4x = 6/4 + 1/4
16x = 7
x = 7/16

-9x+6/3=4x-8/4
- 108/12x + 24/12 = 48/12x - 24/12
- 108/12x - 48/12x = - 24/12 - 24/12
- 156x = - 48
x = 48/156
x = 4/13

3x-7/5=2x+1/2
30/10x - 14/10 = 20/10x + 5/10
30/10x - 20/10x = 5/10 + 14/10
10x = 19
x = 19/10
x = 1,9

bonjour
2x+1/3=x-4/3
2x-x=-4/3-1/3
x=-5/3

5x-2/8=x+3/2
4x=3/2+2/8
4x=3/2+1/4
4x=6/4+1/4
4x=7/4
x=7/4/4
x=7/4*4
x=7/16

-9x+6/3=4x-8/4
-13x=-8/4-6/3
-13x=-24/12-24/12
-13x=-2-2
-13x=-4
x=4/13

3x-7/5=2x+1/2
x=1/2+7/5
x=5/10+14/10
x=19/10
x=1.9