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tatianadufour03
@tatianadufour03
January 2021
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Bonsoir j'ai besoin de votre aide pour un exercice de maths niveau 4ème je n'y arrive pas du tout .
Pouvez m'aider
Merci d'avance . Bonne soirée
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maudmarine
Verified answer
Bonsoir,
A) 13+ ( x- 6)
= 13 + x - 6
= x + 7
B) -5- (4 - 2x)
= - 5 - 4 + 2x
= 2x - 9
C) 10- (x + 3) +( -3x + 6 )
= 10 - x - 3 - 3x + 6
= - 4x + 13
D) (5 + 2x) - (-7 - 7x)
= 5 + 2x + 7 + 7x
= 7x + 12
E) x - 8 -(2+4x -(9-5x ))
= x - 8 - (2 + 4x - 9 + 5x)
= x - 8 - 2 - 4x + 9 - 5x
= - 8x - 1
2 votes
Thanks 0
tatianadufour03
merci beaucoup
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Verified answer
Bonsoir,A) 13+ ( x- 6)
= 13 + x - 6
= x + 7
B) -5- (4 - 2x)
= - 5 - 4 + 2x
= 2x - 9
C) 10- (x + 3) +( -3x + 6 )
= 10 - x - 3 - 3x + 6
= - 4x + 13
D) (5 + 2x) - (-7 - 7x)
= 5 + 2x + 7 + 7x
= 7x + 12
E) x - 8 -(2+4x -(9-5x ))
= x - 8 - (2 + 4x - 9 + 5x)
= x - 8 - 2 - 4x + 9 - 5x
= - 8x - 1