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Misslea52
@Misslea52
January 2021
2
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bonjours je suis en train de faire un QCM de maths est je suis bloqué pouvez-vous
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chrystine
Verified answer
Bonsoir
5x+10=7x-6
5x-7x=-6-10
-2x=-16
x=16/2
x=8
8 euros est le prix d'une BD
8*5=40 plus 10 qui lui reste=50
8*7=56-6 qui lui manque=50
Juliette a
50
euros d'économie
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Thanks 0
loulakar
Verified answer
Bonsoir,
Juliette a :
n : prix d’une BD
5n + 10 = 7n - 6
5n - 5n + 10 = 7n - 5n - 6
10 + 6 = 2n - 6 + 6
16 = 2n
16/2 = 2n/2
n = 8
5 x 8 + 10 = 40 + 10 = 50€
Juliette a 50€ d’economie
0 votes
Thanks 0
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Lista de comentários
Verified answer
Bonsoir5x+10=7x-6
5x-7x=-6-10
-2x=-16
x=16/2
x=8
8 euros est le prix d'une BD
8*5=40 plus 10 qui lui reste=50
8*7=56-6 qui lui manque=50
Juliette a 50 euros d'économie
Verified answer
Bonsoir,Juliette a :
n : prix d’une BD
5n + 10 = 7n - 6
5n - 5n + 10 = 7n - 5n - 6
10 + 6 = 2n - 6 + 6
16 = 2n
16/2 = 2n/2
n = 8
5 x 8 + 10 = 40 + 10 = 50€
Juliette a 50€ d’economie