-20-4n=-7n-5

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Solution for -20-4n=-7n-5 equation: 



-20-4n=-7n-5

We move all terms to the left:

-20-4n-(-7n-5)=0

We get rid of parentheses

-4n+7n+5-20=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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