Sagot :
Bonjour
Résoudre les équations suivantes :
A)2x – 1= 5x - 7
2x - 5x = - 7 + 1
- 3x = - 6
x = 6/3
x = 2
B)3 - 2(x – 4) = x - (5 – 7x)
3 - 2x + 8 = x - 5 + 7x
- 2x - x - 7x = - 5 - 3 - 8
- 10x = - 16
x = 16/10
x = 4/5.
Réponse:
Hey !
A)
2x-1 = 5x -7
-1 = 3x -7
6 = 3x
x = 6/3 = 2
B)
3-2(x-4) = x - (5 - 7x )
3 - 2x + 8 = x - 5 + 7x
3 + 8 + 5 = x + 7x + 2x
16 = 10x
x = 16/10
Bonne journée !