lynny123
lynny123
19-08-2016
Mathematics
contestada
I need to know what 9n -7 = 5n + 5
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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
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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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