9+10n-1=7n-7

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Solution for 9+10n-1=7n-7 equation: 



9+10n-1=7n-7

We move all terms to the left:

9+10n-1-(7n-7)=0

We add all the numbers together, and all the variables

10n-(7n-7)+8=0

We get rid of parentheses

10n-7n+7+8=0

We add all the numbers together, and all the variables

3n+15=0

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

3n=-15

n=-15/3

n=-5

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