7n-9=90

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Solution for 7n-9=90 equation: 



7n-9=90

We move all terms to the left:

7n-9-(90)=0

We add all the numbers together, and all the variables

7n-99=0

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

7n=99

n=99/7

n=14+1/7

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