Fiche de révision 1 2D1
Équations Corrigé
Exercice 1.
Je résous les équations suivantes : 5x = 7x – 2 5x – 7x = - 2 - 2x = - 2 x = 2
2 x = 1 La solution est 1.
6 + 4x = - x – 5 4x + x = - 5 – 6
5x = - 11 x = - 11
5 La solution est - 11
5 . 7x = 15x + 6
7x – 15x = 6 – 8x = 6 x = 6
– 8 x = - 3 4 La solution est - 3
4 .
13y – 5 = 12y + 7 13y – 12y = 5 + 7
y = 12 y = 12 La solution est 12.
4 – 3y = 12y – 3y – 12y = - 4
– 15y = - 4 y = 4
15 y = 4
15 La solution est 4
15 .
7x + 1 = - x – 2 7x + x = - 1– 2
8x = - 3 x = 3
8 La solution est 3
8 .
3 + 5x = 6 – 8x 8x + 5x = 6 – 3
13x = 3 x = 3
13 La solution est 3
13 .
2 – 5x = 2 + 5x - 5x – 5x = 2 – 2
- 10x = 0 x = 0
10 x = 0 La solution est 0.