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Francisca367
@Francisca367
December 2019
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Calcule os valores reais de A e B sabendo que (2a+b, a+b)=(12, 6)
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marcia2017
(2a+b, a+b)=(12, 6)
{2a+b=12
⇒2(6-b)+b=12⇒12-2b+b=12⇒12-b=12⇒12-12=b⇒
b=0
{a+b=6
⇒a=6-b⇒
a=6-0
a=6
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{2a+b=12 ⇒2(6-b)+b=12⇒12-2b+b=12⇒12-b=12⇒12-12=b⇒b=0
{a+b=6 ⇒a=6-b⇒
a=6-0
a=6