18=2-2a

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Solution for 18=2-2a equation: 



18=2-2a

We move all terms to the left:

18-(2-2a)=0

We add all the numbers together, and all the variables

-(-2a+2)+18=0

We get rid of parentheses

2a-2+18=0

We add all the numbers together, and all the variables

2a+16=0

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

2a=-16

a=-16/2

a=-8

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