Réponse :
Bonjour
Explications étape par étape
5x = 3x + 3
5x - 3x = 3
2x = 3
x = 3/2
8x = 12x + 4
12x - 8x = -4
4x = -4
x = -4/4
x = -1
4 - 7y = 10y
4 = 10y + 7y
17y = 4
y = 4/17
7x + 1 = -4 - x
7x + x = -4 - 1
8x = -5
x = -5/8
2 + 3x = 7 - 3x
3x + 3x = 7 - 2
6x = 5
x = 5/6
5 + 6x = -x - 9
6x + x = -9 - 5
7x = -14
11x + 3 = 8x + 7
11x - 8x = 7 - 4
3x = 3
x = 3/3
x = 1
5,5x + 1,5 = 9x + 6
9x - 5,5x = 1,5 - 6
3,5x = -4,5
x = -4,5/3,5
x = -9/7
7 - 3,3x = 2x - 9,7
3,3x + 2x = 7 + 9,7
5,3x = 16,7
x = 16,7/5,3
x = 167/53
5,1 - x = -8x + 1,7
8x - x = 1,7 - 5,1
7x = -3,4
x = -3,4/7
x = -34/70
x = -17/35
Exercice 9)
6x = 6x + 1
6x - 6x = 1
0 = 1 solution vide
3n = 0
n = 0 quelque soit n c’est toujours vrai
0y = 0
0 = 0 quelque soit y c’est toujours vrai
