-20=8+7n

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Solution for -20=8+7n equation: 



-20=8+7n

We move all terms to the left:

-20-(8+7n)=0

We add all the numbers together, and all the variables

-(7n+8)-20=0

We get rid of parentheses

-7n-8-20=0

We add all the numbers together, and all the variables

-7n-28=0

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

-7n=28

n=28/-7

n=-4

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