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TayzEden
@TayzEden
May 2019
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Bonjour, je suis en quatrième et j'ai besoin d'aide avec ces exercices, merci d(avance :)
Résous les équations suivantes
a) 7(2 - x) + -2 b) 6x = 5 (3 + x)
c ) 5(1 - x) -2 (x + 2) d) -3(1 + 2x) = 7(x - 5)
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nathou08
A) 7(2-x)+-2= ((7*2)+(7*-x))+-2
= 14-7x-2
= -7x+12
b) 6x=5(3+x)
6x=15+5x
6x-5x=15
x=15
c)5(1-x)-2(x+2)= 5-5x-2x-4= -7x+1
d)-3(1+2x)=7(x-5)
-3-6x=7x-35
-3+35=7x+6x
32=13x
32/13=x
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= 14-7x-2
= -7x+12
b) 6x=5(3+x)
6x=15+5x
6x-5x=15
x=15
c)5(1-x)-2(x+2)= 5-5x-2x-4= -7x+1
d)-3(1+2x)=7(x-5)
-3-6x=7x-35
-3+35=7x+6x
32=13x
32/13=x