2=18+a

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Solution for 2=18+a equation: 



2=18+a

We move all terms to the left:

2-(18+a)=0

We add all the numbers together, and all the variables

-(a+18)+2=0

We get rid of parentheses

-a-18+2=0

We add all the numbers together, and all the variables

-1a-16=0

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

-a=16

a=16/-1

a=-16

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