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Henri80
@Henri80
April 2019
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Bonjour équations :
Exercice 1 : Résoudre les équations suivantes
a) 3X + 4 = 40 b) 6X + 7 = 19 + 3X
c) 10X - 5 = 30 d) 4X + 19 = 100 - 5X
Exercie 2 : 1) Développer et réduire :
E = 7 ( X -2 ) + 5 ( 2X + 1 )
F = ( 2X - 5 )(4X + 1 )
2) Calculer E et F pour X=3
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geekkhalil
Salut :)
a) 3X + 4 = 40
a) x= 12
b) 6X + 7 = 19 + 3X
b) x= 4
c) 10X - 5 = 30
c) x=
d) 4X + 19 = 100 - 5X
d) x= 9
E = 7 ( X -2 ) + 5 ( 2X + 1 )
E =
17 x-9
F = ( 2X - 5 )(4X + 1 )
F = 8 x²-18 x-5
2) Calculer E et F pour X=3
E = 17 X-9 Alors 17 ×
3
- 9 = 42
F = 8 x²-18 x-5 Alors 8×
3
²-18×
3
-5 = 13
Bye Bye
0 votes
Thanks 3
geekkhalil
Pas de probleme
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a) 3X + 4 = 40
a) x= 12
b) 6X + 7 = 19 + 3X
b) x= 4
c) 10X - 5 = 30
c) x=
d) 4X + 19 = 100 - 5X
d) x= 9
E = 7 ( X -2 ) + 5 ( 2X + 1 )
E = 17 x-9
F = ( 2X - 5 )(4X + 1 )
F = 8 x²-18 x-5
2) Calculer E et F pour X=3
E = 17 X-9 Alors 17 × 3 - 9 = 42
F = 8 x²-18 x-5 Alors 8×3²-18×3-5 = 13
Bye Bye