-15+21=n(5-7)

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Solution for -15+21=n(5-7) equation: 



-15+21=n(5-7)

We move all terms to the left:

-15+21-(n(5-7))=0

We add all the numbers together, and all the variables

-(n(-2))-15+21=0

We add all the numbers together, and all the variables

-(n(-2))+6=0



We calculate terms in parentheses: -(n(-2)), so:

n(-2)

We multiply parentheses

-2n

Back to the equation:

-(-2n)



We get rid of parentheses

2n+6=0

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

2n=-6

n=-6/2

n=-3

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