129=3(7n+8)

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Solution for 129=3(7n+8) equation: 



129=3(7n+8)

We move all terms to the left:

129-(3(7n+8))=0



We calculate terms in parentheses: -(3(7n+8)), so:

3(7n+8)

We multiply parentheses

21n+24

Back to the equation:

-(21n+24)



We get rid of parentheses

-21n-24+129=0

We add all the numbers together, and all the variables

-21n+105=0

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

-21n=-105

n=-105/-21

n=+5

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