-129=3(-3-5n)

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Solution for -129=3(-3-5n) equation: 



-129=3(-3-5n)

We move all terms to the left:

-129-(3(-3-5n))=0

We add all the numbers together, and all the variables

-(3(-5n-3))-129=0



We calculate terms in parentheses: -(3(-5n-3)), so:

3(-5n-3)

We multiply parentheses

-15n-9

Back to the equation:

-(-15n-9)



We get rid of parentheses

15n+9-129=0

We add all the numbers together, and all the variables

15n-120=0

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

15n=120

n=120/15

n=8

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