7(-n-3)=-10(n+3)

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Solution for 7(-n-3)=-10(n+3) equation: 



7(-n-3)=-10(n+3)

We move all terms to the left:

7(-n-3)-(-10(n+3))=0

We add all the numbers together, and all the variables

7(-1n-3)-(-10(n+3))=0

We multiply parentheses

-7n-(-10(n+3))-21=0



We calculate terms in parentheses: -(-10(n+3)), so:

-10(n+3)

We multiply parentheses

-10n-30

Back to the equation:

-(-10n-30)



We get rid of parentheses

-7n+10n+30-21=0

We add all the numbers together, and all the variables

3n+9=0

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

3n=-9

n=-9/3

n=-3

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