bonjour bonjour !
1. 2x + 4 = 7
2x = 7 - 4
2x = 3
x = 3/2 = 1,5
3. 3x – 10 = 6x – 4
3x - 6x = - 4 + 10
-3x = 6
x = 6/(-3) = -2
2. – 3x + 8 = – 1
-3x = -1-8
x = 9/3 = 3
5x + 4 = – 2x + 32
5x + 2x = 32 - 4
7x = 28
x = 28/7 = 4
Réponse :
Explications étape par étape
1. 2x + 4 = 7
2x = 7 - 4
2x = 3
x = 3/2 = 1,5
3. 3x – 10 = 6x – 4
3x - 6x = - 4 + 10
-3x = 6
x = 6/(-3) = -2
2. – 3x + 8 = – 1
-3x = -1-8
x = 9/3 = 3
5x + 4 = – 2x + 32
5x + 2x = 32 - 4
7x = 28
x = 28/7 = 4
