40=-4(n-3)

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Solution for 40=-4(n-3) equation: 



40=-4(n-3)

We move all terms to the left:

40-(-4(n-3))=0



We calculate terms in parentheses: -(-4(n-3)), so:

-4(n-3)

We multiply parentheses

-4n+12

Back to the equation:

-(-4n+12)



We get rid of parentheses

4n-12+40=0

We add all the numbers together, and all the variables

4n+28=0

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

4n=-28

n=-28/4

n=-7

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