Bonjour,
j'ai un dm de maths demain et je ne sais pas si ma réponse est juste
(6x+3) + (-3x+4) = 0
6x+3-3x+4 = 0
3x + 7 =0
3x = 0-7
3x = -7
x = -7/3 ou
(6x+3) + (-3x+4) = 0
6x+3 =0
6x = -3
x = -3/6 = -1/2

-3x+4 =0
-3x =-4
x = 4/3
laquelle est juste ? merci
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