Bonsoir,
a) 6x = 36
x = 36/6
x = 6
b) 3x = 26
x = 26/3
x = 8.6
c) -4x = 39
x = - 39/4
x = - 9.75
d) 5x = -12
x = - 12/5
x = - 2.4
e) -12x = -52
x = -52/-12
x = 13/3
x = 4.3
f) x² = 144
x = racine de 144
x = 12
g) x² = 50
x = racine de 50
x = 7.07
i) x - 13 = 6
x = 6 + 13
x = 19
j) 7x + 1 = 15
7x = 15 - 1
7x = 14
x = 14/7
x = 2
k) 5x - 9 = 6
5x = 6 + 9
5x = 15
x = 15/5
x = 3
l) 2x + 5 = -7
2x = - 7 - 5
2x = - 12
x = -12/2
x = -6
m) - 3x - 2 = 19
-3x = 19 + 2
-3x = 21
x = 21/-3
x = -7
Voilà pour tes 12 équations, j'espère t'avoir aidé.
Ta note = 12/12
