Pouvez m 'aider à faire ces exercices comme l'exemple:
Exemple:

5x - 4 = 3x + 2

donc 5x - 4 - (3x +2) = 0

donc 5x - 4- 3x - 2 =0

donc 2x - 6 = 0

donc 2x = 6

donc 2 * x = 6

donc x = 6/2

donc x = 3

exercice 43 :
a) 7x - 6 = 4 - 3x
b) 12 - a = 18 - 3a
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