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[Frage]Mathe

Discussion on [Frage]Mathe within the Oldschool forum part of the Off-Topics category.

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Old   #1
 
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[Frage]Mathe

Hi,
kann mir evtl. jemand mal diese Aufgabe hier vorrechnen?
hatte es so:

2x + 3 = 4x - 11 |Zusammenfassen
3 = 2x - 11 |-2x
3 = -9x |-11
3 = -9x |:3

x = 3

ist aber falsch, oder? Was kommt denn eigentlich raus, kann das mal bitte jemand vorrechnen? :x
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Old 01/11/2013, 19:14   #2
 
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Wir sind kein Hausaufgabenforum.
Zu der Aufgabe: Du musst auf beiden Seiten das gleiche ausführen. Bei -11 hast du vergessen, auch die 3 zu subtrahieren und wie kommst du auf -9x man kann nicht -9x - 11 rechnen.
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Old 01/11/2013, 19:51   #3

 
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2x + 3 = 4x - 11
2x = 4x -14
14 = 2x
7 = x

Glaube ich mal
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Old 01/11/2013, 20:54   #4


 
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2x + 3 = 4x - 11
11 + 3 = 4x - 2x
14 = 2x
7 = x

So würd ich's rechnen.
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Old 01/12/2013, 00:09   #5
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