7(3x+5)=3(3-2x)+2(5x-21)
Mathématiques
castelaintotoph
Question
7(3x+5)=3(3-2x)+2(5x-21)
2 Réponse
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1. Réponse Anonyme
7(3x + 5) = 3(3 - 2x) + 2(5x - 21)
21x + 35 = 9 - 6x + 10x - 42
21x + 6x - 10x = 9 - 42 - 35
17x = - 68
x = - 68/17
x = - 4 -
2. Réponse anno32
Bonsoir
7(3x + 5) = 3(3 - 2x) + 2(5x - 21)
21x + 35 = (9 - 6x )+ (10x - 42)
21x + 6x - 10x = 9 - 42 - 35
17x = - 68
x = -68/17
x = -4