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anthonyviani
@anthonyviani
June 2021
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l'exercice que je demande exercice numéro 5 svp reponder vite merci
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Thomas1106
Nombre de billets de 20 euros : x billets
Nombre de billets de 10 euros : 40-x billets
20x+10*(40-x) = 670
20x+400-10x = 670
10x+400 = 670
10x+400
-400
= 670
-400
10x = 270
x = 270/10
x = 27
Nombre de billets de 20 euros :
x =
27 billets
⇒ 27*20 = 540 euros
Nombre de billets de 10 euros :
40-x = 40-27 =
13 billets
⇒ 13*10 = 130 euros
3 votes
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c'est l'exercice 58 et 61 c'est urgent merci
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Lista de comentários
Nombre de billets de 10 euros : 40-x billets
20x+10*(40-x) = 670
20x+400-10x = 670
10x+400 = 670
10x+400-400 = 670-400
10x = 270
x = 270/10
x = 27
Nombre de billets de 20 euros : x = 27 billets ⇒ 27*20 = 540 euros
Nombre de billets de 10 euros : 40-x = 40-27 = 13 billets ⇒ 13*10 = 130 euros