84-5a=7a

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Solution for 84-5a=7a equation: 



84-5a=7a

We move all terms to the left:

84-5a-(7a)=0

We add all the numbers together, and all the variables

-12a+84=0

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

-12a=-84

a=-84/-12

a=+7

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