-10n-20=-10(10-7n)

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Solution for -10n-20=-10(10-7n) equation: 



-10n-20=-10(10-7n)

We move all terms to the left:

-10n-20-(-10(10-7n))=0

We add all the numbers together, and all the variables

-10n-(-10(-7n+10))-20=0



We calculate terms in parentheses: -(-10(-7n+10)), so:

-10(-7n+10)

We multiply parentheses

70n-100

Back to the equation:

-(70n-100)



We get rid of parentheses

-10n-70n+100-20=0

We add all the numbers together, and all the variables

-80n+80=0

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

-80n=-80

n=-80/-80

n=1

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