7-2a=12a

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Solution for 7-2a=12a equation: 



7-2a=12a

We move all terms to the left:

7-2a-(12a)=0

We add all the numbers together, and all the variables

-14a+7=0

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

-14a=-7

a=-7/-14

a=1/2

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