-3(5n-5)=21

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Solution for -3(5n-5)=21 equation: 



-3(5n-5)=21

We move all terms to the left:

-3(5n-5)-(21)=0

We multiply parentheses

-15n+15-21=0

We add all the numbers together, and all the variables

-15n-6=0

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

-15n=6

n=6/-15

n=-2/5

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