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Exercice 2
Niveau 1
Résoudre les équations suivantes :
a.
b.
X - 5 = 0
x + 2 = 0
x + 3 = 0
1- x = 0
x –9 = 0
-x +3= 0
C.
- x - 4 = 0
-x + 8 = 0
x - a = 0 avec a un nombre quelconque​

Sagot :

Bonjour,

x - 5 = 0

x = 0 + 5

x = 5

x + 2 = 0

x = 0 - 2

x = -2

x + 3 = 0

x = 0 - 3

x = -3

1 - x = 0

- x = 0 - 1

- x = -1

x = 1

x - 9 = 0

x = 0 + 9

x = 9

-x + 3 = 0

-x = 0 - 3

-x = -3

x = 3

- x - 4 = 0

- x = 0 + 4

- x = 4

x = -4

-x + 8 = 0

-x = 0 - 8

-x = -8

x = 8

x - a = 0

- a = 0 - x

- a = - x

a = x