3a-a+3=30-a

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Solution for 3a-a+3=30-a equation: 



3a-a+3=30-a

We move all terms to the left:

3a-a+3-(30-a)=0

We add all the numbers together, and all the variables

3a-a-(-1a+30)+3=0

We add all the numbers together, and all the variables

2a-(-1a+30)+3=0

We get rid of parentheses

2a+1a-30+3=0

We add all the numbers together, and all the variables

3a-27=0

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

3a=27

a=27/3

a=9

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