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Asckobly
@Asckobly
April 2019
2
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Bonsoir,
Je suis en classe de quatrième.
Ma question est la suivante :
Paul a x cartes magiques.
Jean a x - 20 cartes magiques
Julien a (x- 20)×2 cartes magiques.
→ Ecrire en fonction de x une expression donnant la somme du nombre de cartes qu'ont Paule Julien et Jean en tout.
→ Développer et réduire cette expression.
Merci d'avance,
Asckobly. ω
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nathalienouts
X+x-20+2(x-20)
2x-20+2x-40
4x-60
0 votes
Thanks 1
MarieRD
X+(x-20)+ (x-20)2
x+(x-20)+ (2x-40)
x+x-20+2x-40
4x-60
4x=60
x=60/4=15
x=15
0 votes
Thanks 0
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2x-20+2x-40
4x-60
x+(x-20)+ (2x-40)
x+x-20+2x-40
4x-60
4x=60
x=60/4=15
x=15