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Gorgerira
@Gorgerira
May 2019
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Pouvez vous maider pour l'exercice 50 juste le a) et b) Merci .
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Lemuel6
50.
a.
5(8+2x) = 2(1-x)
⇒ 40 + 10x = 2 -2x
⇒ 10x + 2x = 2 -40
⇒ 12x = -38
⇒ x = -38/12
⇒
x = - 19/6
b.
4 -(2+3x) = -4 (1+3x)
⇒ 4 -2 -3x = -4 -12x
⇒ 12x -3x = -4 -4 + 2
⇒ 9x = -6
⇒ x = -6/9
⇒
x = - 2/3
c.
7-3 (x+5) = 7(2-2x)
⇒ 7-3x-15 = 14 - 14x
⇒ 14x -3x = 14 + 15 -7
⇒ 11x = 22
⇒ x = 22/11
⇒
x = 2
d.
5x+6-3(1+5x) = 4x- 3
⇒ 5x +6 -3 -15x = 4x-3
⇒ 5x-15x-4x = -3 -6 +3
⇒ -14x = -6
⇒ x = -6/-14
⇒
x = 3/7
1 votes
Thanks 1
Gorgerira
Merci beaucoup davoir pris ron tzmps poir maider ;-)
Lemuel6
derien
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Gorgerira
January 2021 | 0 Respostas
Mzrci baucou pour votre aide !!
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Gorgerira
May 2019 | 0 Respostas
Urgent!!! merci beaucoup
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Gorgerira
May 2019 | 0 Respostas
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Gorgerira
May 2019 | 0 Respostas
Merci pour votre aide cela est vraiment tres Urgent!
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Gorgerira
May 2019 | 0 Respostas
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Gorgerira
May 2019 | 0 Respostas
Pouvez vius m'aider sil vous plait merci beaucoup
Responda
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Lista de comentários
a. 5(8+2x) = 2(1-x)
⇒ 40 + 10x = 2 -2x
⇒ 10x + 2x = 2 -40
⇒ 12x = -38
⇒ x = -38/12
⇒ x = - 19/6
b. 4 -(2+3x) = -4 (1+3x)
⇒ 4 -2 -3x = -4 -12x
⇒ 12x -3x = -4 -4 + 2
⇒ 9x = -6
⇒ x = -6/9
⇒ x = - 2/3
c. 7-3 (x+5) = 7(2-2x)
⇒ 7-3x-15 = 14 - 14x
⇒ 14x -3x = 14 + 15 -7
⇒ 11x = 22
⇒ x = 22/11
⇒ x = 2
d. 5x+6-3(1+5x) = 4x- 3
⇒ 5x +6 -3 -15x = 4x-3
⇒ 5x-15x-4x = -3 -6 +3
⇒ -14x = -6
⇒ x = -6/-14
⇒ x = 3/7