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elzaa62
@elzaa62
April 2022
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Bonjour merci !! !!!!
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Réponse :[tex]bonjour\\\\- 7 x - 4 = - 8 x - 9\\- 7 x + 8 x = - 9 + 4\\x = - 5 \\\\3 x - 5 = 7 x + 9\\3 x - 7 x = 9 + 5\\- 4 x = 14 \\x = - 14/4 = - 3.5 \\\\14 x + 18 = 27 x + 18 \\14 x - 27 x = 18 - 18\\- 13 x = 0 \\x = 0 \\\\6 x + 24 = 7 x + 9 + 3 x + 1\\6 x - 7 x - 3 x = 9 + 1 - 24\\- 4 x = - 14\\x = 14/4 = 3.5 \\\\[/tex]Explications étape par étape :
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elzaa62
merci énormément de ton aide !!
mari433
Réponse:bonjourExplications étape par étape:a) -7x-4 =-8x -98x-7x=4-9x=-5b) 3x -5 = 7x+9 3x-7x=9+5 -4x =14 -x=14/4 or 14/4=7/2=3,5 -x=3,5 x=-3,5c) 2(7x+9) = 3(9x+6) 14x+18 =27x+18 14x-27x= 18-18 13x=0 x=0/13 x=0d) -3(-2x-8) = -(7x-9)+(3x+1) 6x+24 =7x+9+3x+1 6x + 24 =10x+10 6x-10x=10-24 -4x = -14 -x= -14/4 or -14/4= -3,5 -x=-3,5 x=3,5
2 votes
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exo 2 aidez moi svp !!!
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