2. Vérifier que -6 est une solution des équations suivantes.
(a) 6x-4 = 4x - 16
Pour x = -6.
6x-4=.............
4x-16=..............
(b) x² + 4x = -x +6
Pour x = -6
x2 + 4x =..….........
-x + 6 =..................
(c) -5x+1=x+37
Pour x = -6
-5x+1=..............
x+37=..............​
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