9+10n=7n

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Solution for 9+10n=7n equation: 



9+10n=7n

We move all terms to the left:

9+10n-(7n)=0

We add all the numbers together, and all the variables

3n+9=0

We move all terms containing n to the left, all other terms to the right

3n=-9

n=-9/3

n=-3

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