a+7=3a

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Solution for a+7=3a equation: 



a+7=3a

We move all terms to the left:

a+7-(3a)=0

We add all the numbers together, and all the variables

-2a+7=0

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

-2a=-7

a=-7/-2

a=3+1/2

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