Sagot :
bonjour
x + 8 = 5
x = 5 - 8
x = - 3
x - 4 = - 1
x = - 1 + 4
x = 3
3 x + 2 = 2 x
3 x - 2 x = - 2
x = - 2
5 x - 4 = 4 x
5 x - 4 x = 4
x = 4
- 2 x + 3 = - 3 x
- 2 x + 3 x = - 3
x = - 3
4 x - 7 = 5 + 3 x
4 x - 3 x = 5 + 7
x = 12
- x + 3.2 = - 2 x - 4 .3
- x + 2 x = - 4.3 - 3.2
x = - 7 .5
Réponse :
Explications étape par étape
x +8 = 5
x = -8 +5
x = -3
x -4 = -1
x = 4 -1
x = 3
3x +2 = 2x
3x -2x = -2
x = -2
5x -4 = 4x
5x -4x = +4
x = 4
-2x +3 = -3x
-2x +3x = -3
x = -3
4x -7 = 5 +3x
4x -3x = 7 +5
x = +12
-x +3,2 =- 2x -4,3
-x +2x = -3,2 -4,3
x = -7,5