20+20n=-7(-4n+20)

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Solution for 20+20n=-7(-4n+20) equation: 



20+20n=-7(-4n+20)

We move all terms to the left:

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



We calculate terms in parentheses: -(-7(-4n+20)), so:

-7(-4n+20)

We multiply parentheses

28n-140

Back to the equation:

-(28n-140)



We get rid of parentheses

20n-28n+140+20=0

We add all the numbers together, and all the variables

-8n+160=0

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

-8n=-160

n=-160/-8

n=+20

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