Sagot :
Réponse :
Explications étape par étape
Bonjour
Exercice 1 :
1. x + 8 = 43
x = 43 - 8
x = 35
4. z - 5 = 43
z = 43 + 5
z = 48
2. 3 + x = 17
x = 17 - 3
x = 14
5. y - 108 = -3
y = -3 + 108
y = 105
3. z + 8,5 = 12
z = 12 - 8,5
z = 3,5
6. -13 + x = 17
x = 17 + 13
x = 30
Exercice 2 :
1. 2x +18 = x
2x - x = -18
x = -18
4. 2x = 3x
3x - 2x = 0
x = 0
2. 112 - z = 43
z = 112 - 43
z = 69
5. 11 - w = 0
w = 11
3. 113 + x =17
x = 17 - 113
x = -96
6. x + x = 17 + x
2x - x = 17
x = 17