-6x-6=-3x-21

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Solution for -6x-6=-3x-21 equation: 



-6x-6=-3x-21

We move all terms to the left:

-6x-6-(-3x-21)=0

We get rid of parentheses

-6x+3x+21-6=0

We add all the numbers together, and all the variables

-3x+15=0

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

-3x=-15

x=-15/-3

x=+5

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