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Kalou2001
@Kalou2001
April 2019
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Martin a dépensé 4/7 de ses économies pour acheter sa nouvelle voiture. Il lui reste 6000€ sur son compte. Combien coûtait la voiture?
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nonotata
Soit x le montant de ses economies
on sait que
x = 4/7x +6000
x -4/7x = 6000
7/7x-4/7x = 6000
3/7x = 6000
x =6000*7/3
x = 14 000
donc 14 000 -6000 = 8000
sa voiture coute donc 8000 euros
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on sait que
x = 4/7x +6000
x -4/7x = 6000
7/7x-4/7x = 6000
3/7x = 6000
x =6000*7/3
x = 14 000
donc 14 000 -6000 = 8000
sa voiture coute donc 8000 euros