Sagot :
bonjour
5 x - 8 = 2 + 3 x
5 x - 3 x = 2 + 8
2 x = 10
x = 5
14 - 4 x = - 3 x + 21
- 4 x + 3 x = 21 - 14
- x = 7
x = - 7
4 x - 3 - x - 1 = 5 x + 2
3 x - 5 x = 2 + 3 + 1
- 2 x = 6
x = - 3
Bonjour,
Réponse:
a) 5x-3x=2+8
2x= 10
x= 10÷2=5
b) 2×7+2×2x = -3×x + (-3) ×7
14+4x = -3x -21
4x+7x =-14-21
11x = -35
x= -35÷11 ≈ 3,2
c) 4x -3 -x -1 = 5x +2
4x -5x -x = 2 -3 -1
-2x = -2
x = -2÷-2 =1
J'espère avoir aidé