12a-15=6-30a

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Solution for 12a-15=6-30a equation: 



12a-15=6-30a

We move all terms to the left:

12a-15-(6-30a)=0

We add all the numbers together, and all the variables

12a-(-30a+6)-15=0

We get rid of parentheses

12a+30a-6-15=0

We add all the numbers together, and all the variables

42a-21=0

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

42a=21

a=21/42

a=1/2

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