3x+2y= -8 -12x+7y= 17
Mathématiques
Nano22
Question
3x+2y= -8
-12x+7y= 17
1 Réponse
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1. Réponse Anonyme
4(3x+2y) = -8
-12x+7y = 17
12x+8y = -32
-12x+7y = 17
15y = -15
y = -1
3x+2y = -8
3x-2 = -8
3x = -6
x =-2