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Fafaark
@Fafaark
May 2019
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Salut j'ai besoin d'aide en maths . Merci
Réduire ;
A= a+(b-5+a)-(13-a+b)
B= -8+a-b-(4-b)+(a+b-6)
C= a+(b-5-b)+a-6+8-a
D= (a+b-7)-b-(-5+a-b)
E= b-(4-a-b-6)+(2-a+a-b)
F= 1-(a-9)+(3+b)-(12+a+b)
G et H j'ai déjà fais donc je ne l'ai met pas
Vous pouvez me mettre le étapes s'il vous plaît pour que je comprenne . Merci
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calinizou
Verified answer
Bonjour tu enléves les parenthèses
a=a+(b-5+a)-(13-a+b)=
a+b-5+a-13+a-b=
3a-18
b=-8+a-b-(4-b)+(a+b-6)=
-8+a-b-4+b+a+b-6=
2a+b-18
c=a+(b-5-b)+a-6+8-a=
a+b-5-b+a-6+8-a=
a-3
d=(a+b-7)-b-(-5+a-b)=
a+b-7-b+5-a+b=
b-2
e=b-(4-a-b-6)+(2-a+a-b)=
b-4+a+b+6+2-a+a-b=
a+b+4
f=1-(a-9)+(3+b)-(12+a+b)=
1-a+9+3+b-12-a-b=
-2a+1
1 votes
Thanks 1
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Verified answer
Bonjour tu enléves les parenthèsesa=a+(b-5+a)-(13-a+b)=
a+b-5+a-13+a-b=
3a-18
b=-8+a-b-(4-b)+(a+b-6)=
-8+a-b-4+b+a+b-6=
2a+b-18
c=a+(b-5-b)+a-6+8-a=
a+b-5-b+a-6+8-a=
a-3
d=(a+b-7)-b-(-5+a-b)=
a+b-7-b+5-a+b=
b-2
e=b-(4-a-b-6)+(2-a+a-b)=
b-4+a+b+6+2-a+a-b=
a+b+4
f=1-(a-9)+(3+b)-(12+a+b)=
1-a+9+3+b-12-a-b=
-2a+1