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Maliabb
@Maliabb
December 2019
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Calcule a e b no sistema a seguir:
a) a+2b=10
a+b=8
b) 2a-b=8
a+b=7
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VictorPasini
A) a+b=8, então b=8-a
colocando na formula de cima
a+2(8-a)=10
a+16-2a=10
6=a
2=b
b)a=7-b
2(7-b)+b=8
14-2b+b=8
-6=b
1=a
1 votes
Thanks 1
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colocando na formula de cima
a+2(8-a)=10
a+16-2a=10
6=a
2=b
b)a=7-b
2(7-b)+b=8
14-2b+b=8
-6=b
1=a