3a-12=6a-30

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Solution for 3a-12=6a-30 equation: 



3a-12=6a-30

We move all terms to the left:

3a-12-(6a-30)=0

We get rid of parentheses

3a-6a+30-12=0

We add all the numbers together, and all the variables

-3a+18=0

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

-3a=-18

a=-18/-3

a=+6

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