18=(a-2.5)

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Solution for 18=(a-2.5) equation: 



18=(a-2.5)

We move all terms to the left:

18-((a-2.5))=0



We calculate terms in parentheses: -((a-2.5)), so:

(a-2.5)

We get rid of parentheses

a-2.5

Back to the equation:

-(a-2.5)



We get rid of parentheses

-a+2.5+18=0

We add all the numbers together, and all the variables

-1a+20.5=0

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

-a=-20.5

a=-20.5/-1

a=20+0.5/1

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