123=-3(1-7n)

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Solution for 123=-3(1-7n) equation: 



123=-3(1-7n)

We move all terms to the left:

123-(-3(1-7n))=0

We add all the numbers together, and all the variables

-(-3(-7n+1))+123=0



We calculate terms in parentheses: -(-3(-7n+1)), so:

-3(-7n+1)

We multiply parentheses

21n-3

Back to the equation:

-(21n-3)



We get rid of parentheses

-21n+3+123=0

We add all the numbers together, and all the variables

-21n+126=0

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

-21n=-126

n=-126/-21

n=+6

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