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dodie200
@dodie200
February 2021
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Bonjour pourriez vous m'aidez je ne comprend pas:
{2x-3y=3 -4x+5y=-7
et
{3x+y=5 2x+3y=1
2
Voir les réponses
leabangerter
leabangerter
2x+4x=5y+3y=-7-3
6x=8y=-10
après pour le deuxième est tu sur qu'il ne manque pas un signe?
abdouana
abdouana
2x-3y=3 x=3(y+1)/2 x=3(y+1)/2
{ <=> {
<=> {
-4x+5y=-7
-4x+5y=-7 -12(y+1)/2 +5y=-7
x=3(y+1)/2 x=3(y+1)/2 x=3
{ <=> { donc {
-y=-1 y=1 y=1
de meme pour le rest ^^
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