18=-3+x

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Solution for 18=-3+x equation: 



18=-3+x

We move all terms to the left:

18-(-3+x)=0

We add all the numbers together, and all the variables

-(x-3)+18=0

We get rid of parentheses

-x+3+18=0

We add all the numbers together, and all the variables

-1x+21=0

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

-x=-21

x=-21/-1

x=+21

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