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Problema Matematica

 
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Skip3

[Mentally Stable]



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(since 04-11-2014 17:54)
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Location: Balteni , Olt

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Post Posted: 16-01-2013, 14:02:33 | Translate post to: ... (Click for more languages)

La un concurs se acorda 4 puncte pentru o problema rezolvata corect si se scade un punct pentru o problema rezolvata gresit . Diana a trimis 15 probleme si a primit 50 de puncte.
Cate probleme a rezolvat corect si cate a rezolvat gresit ?

Plan De Rezolvare

1. Numarul punctelor ce s-ar fi primit pentru 15 probleme rezolvate corect.
Va Veni 15x4=60 in totalitate puncte pentru 15 probleme

2.Numarul punctelor pierdute de fetita.
Va Veni 60-50=10 puncte pierdute scad totalitatea punctelor de la punctu 1 cu cele 50 puncte

3.Numarul punctelor pierdute pentru o problema gresita.

4.Numarul problemelor rezolvate gresit.

5.Numarul problemelor rezolvate corect.


Imi trebuie operati unde am lasat loc liber la 3,4,5 ca n-avem voie sa punem direct raspunsu'.

Dau Reputatie !!!!!


Multumesc.
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Zohlomg

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Post Posted: 17-01-2013, 18:12:43 | Translate post to: ... (Click for more languages)

4x-y = 50
x+y=15

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BucovinA

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Post Posted: 17-01-2013, 23:45:30 | Translate post to: ... (Click for more languages)

5x=65=>x=13
y=15-13=2



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Skip3

[Mentally Stable]



Status: Offline
(since 04-11-2014 17:54)
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Location: Balteni , Olt

Reputation: 48.5
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Post Posted: 18-01-2013, 13:43:07 | Translate post to: ... (Click for more languages)

Multumesc - -

*** iti dau si tie dar trb sa astept 30 minute.


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