7-20n=20-7n

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Solution for 7-20n=20-7n equation: 



7-20n=20-7n

We move all terms to the left:

7-20n-(20-7n)=0

We add all the numbers together, and all the variables

-20n-(-7n+20)+7=0

We get rid of parentheses

-20n+7n-20+7=0

We add all the numbers together, and all the variables

-13n-13=0

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

-13n=13

n=13/-13

n=-1

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