lynny123
lynny123 lynny123
  • 19-08-2016
  • Mathematics
contestada

I need to know what 9n -7 = 5n + 5

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dalendrk
dalendrk dalendrk
  • 19-08-2016
9n - 7 = 5n + 5    |add 7 to both sides

9n = 5n + 12    |subtract 5n from both sides

4n = 12    |divide both sides by 4

n = 3
Answer Link
Аноним Аноним
  • 19-08-2016
[tex]9n -7 = 5n + 5[/tex] 

[tex]9n=5n+5+7 [/tex] 

[tex]9n=5n+12[/tex] 

[tex]9n-5n=12[/tex] 

[tex]4n=12[/tex] 

[tex]n=12/4[/tex] 

[tex]n=3[/tex]
Answer Link

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