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Meilleure réponse !
2014-05-02T17:12:42+02:00
Résoudre chaque équation
a)
2x - 5 = 6
2x = 6 + 5
2x = 11
x = 11/2
x = 5,5

b)
2(x - 5) = 6
2x - 10 = 6
2x = 6 + 10
2x = 16
x = 16/2
x = 8

c)
3 (2x - 7) = 0
6x - 21 = 0
6x = 21
x = 21/6
x = 3,5

d)
4x² = 100

x² = 100/4
x² = 25
x = 5 et x = 5