18+x=-(x+3)

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Solution for 18+x=-(x+3) equation: 



18+x=-(x+3)

We move all terms to the left:

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



We calculate terms in parentheses: -(-(x+3)), so:

-(x+3)

We get rid of parentheses

-x-3

We add all the numbers together, and all the variables

-1x-3

Back to the equation:

-(-1x-3)



We get rid of parentheses

x+1x+3+18=0

We add all the numbers together, and all the variables

2x+21=0

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

2x=-21

x=-21/2

x=-10+1/2

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