18a-3=39-3a

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Solution for 18a-3=39-3a equation: 



18a-3=39-3a

We move all terms to the left:

18a-3-(39-3a)=0

We add all the numbers together, and all the variables

18a-(-3a+39)-3=0

We get rid of parentheses

18a+3a-39-3=0

We add all the numbers together, and all the variables

21a-42=0

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

21a=42

a=42/21

a=2

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