A=(x-18)

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Solution for A=(x-18) equation: 



=(A-18)

We move all terms to the left:

-((A-18))=0



We calculate terms in parentheses: -((A-18)), so:

(A-18)

We get rid of parentheses

A-18

Back to the equation:

-(A-18)



We get rid of parentheses

-A+18=0

We add all the numbers together, and all the variables

-1A+18=0

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

-A=-18

A=-18/-1

A=+18

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