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fiche - Secondaire - De Boeck

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Exercice 2<br />

Résoudre par substitution.<br />

a.<br />

b.<br />

c.<br />

ìx+<br />

y=-<br />

í<br />

ï 7<br />

î<br />

ï<br />

ï5x+<br />

4y= 33<br />

ìx+<br />

y=<br />

í<br />

ï 5 27<br />

î<br />

ï<br />

ï7x-<br />

6y= 98<br />

ì4x-<br />

5y=-35 í<br />

ï<br />

î<br />

ï<br />

ïx+<br />

4y= 7<br />

Exercice 3<br />

Résoudre par graphique.<br />

ìï<br />

y=- x+<br />

2<br />

ï<br />

a. ï<br />

í<br />

ï<br />

1 1<br />

ïy=<br />

x+<br />

îï<br />

2 2<br />

Chapitre 5 : Systèmes d’équations<br />

1<br />

0<br />

y<br />

1<br />

x<br />

<strong>fiche</strong><br />

20<br />

autocorrective<br />

© Groupe <strong>De</strong> <strong>Boeck</strong>, 2010

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