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Trigo
@Trigo
May 2019
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Quelqu'un peut-il me faire l'exercice 22 svp
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trudelmichel
Verified answer
Bonjour,
si nous avons
x+2y=0.4
et
3x+5y=0.9
alors nous avons aussi
3x+6y=1.2
et
3x+5y=0.9
d'où
(3x+6y)-(3x+5y)=1.2-0.9
3x+6y-3x-5y=0.3
y=0.3
si y=0.3
allors
x+2y=0.4
x+2(0.3)=0.4
x+0.6=0.4
x=0.4-0.6
x=-0.2
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Lista de comentários
Verified answer
Bonjour,si nous avons
x+2y=0.4
et
3x+5y=0.9
alors nous avons aussi
3x+6y=1.2
et
3x+5y=0.9
d'où
(3x+6y)-(3x+5y)=1.2-0.9
3x+6y-3x-5y=0.3
y=0.3
si y=0.3
allors
x+2y=0.4
x+2(0.3)=0.4
x+0.6=0.4
x=0.4-0.6
x=-0.2