-2x-18=x+3

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Solution for -2x-18=x+3 equation: 



-2x-18=x+3

We move all terms to the left:

-2x-18-(x+3)=0

We get rid of parentheses

-2x-x-3-18=0

We add all the numbers together, and all the variables

-3x-21=0

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

-3x=21

x=21/-3

x=-7

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