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higorr
@higorr
October 2020
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Obtenha o valor de x de modo que (x, 2x + 1, 5x + 7) seja uma P.A.
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3478elc
x, 2x + 1, 5x + 7
2x + 1 - x = 5x + 7 -(2x+1)
x + 1 = 5x+ 7 - 2x - 1
1-7+ 1 = 5x-2x-x
2x = - 5
x= - 5/2
93 votes
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C
Clawdeen Wolf
(X,2x+1,5x+7)
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G
Gabe
-6x-4-5x=5+6x-7-8
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Lista de comentários
x, 2x + 1, 5x + 7
2x + 1 - x = 5x + 7 -(2x+1)
x + 1 = 5x+ 7 - 2x - 1
1-7+ 1 = 5x-2x-x
2x = - 5
x= - 5/2