Super urgent svp!!!!!!!!.... Pergunta de ideia deloloadixia

January 2021 1 91 Report

Super urgent svp!!!!!!!!

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Omnes Salut,

a)

3(x+1) - (x-9) + (x+3) = (x+4) + (x+2) - (11-x)
<=> 3x + 3 - x + 9 + x + 3 = x + 4 + x + 2 - 11 + x
<=> 3x + 15 = 3x -5
<=> 0 = - 20 <=> Impossible !

b)

7(2x-5) - 5(3x+1) = 6(x-4) - 7
<=> 14x - 30 - 15x - 5 = 6x - 24 - 7
<=> -x - 35 = 6x - 21
<=> - 7x = 14
<=> x = -2

c)

6(x-3) - 3(x-2) = 4(3-x) + 5
<=> 6x - 18 -3x + 6 = 12 - 4x + 5
<=> 3x - 12 = -4x + 17
<=> 7x = 29
<=> x = 29/7

Exercice 3

a) Multiplions tout par 15
10x + 75 = 6x + 90
<=> 4x = 15
<=> x = 15/4

b) Multiplions le tout par 15
9x - (2x-7) + 5x = 0
<=> 9x - 2x + 7 + 5x = 0
<=> 12x + 7 = 0
<=> x = -7/12

Bonne soirée !

0 votes Thanks 1

loloadixia Merci énormément

quentinx38 c'est toute à fait ça!

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svvvvvppppp troooopppppppp besoin de vous

aider moiiiiiii svp :) :) je n'y arrive pas

L'exercice 1 svvpppppop c'est pour lundi

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