-3x-21=81

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Solution for -3x-21=81 equation: 



-3x-21=81

We move all terms to the left:

-3x-21-(81)=0

We add all the numbers together, and all the variables

-3x-102=0

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

-3x=102

x=102/-3

x=-34

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