84=5a+9a

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Solution for 84=5a+9a equation: 



84=5a+9a

We move all terms to the left:

84-(5a+9a)=0

We add all the numbers together, and all the variables

-(+14a)+84=0

We get rid of parentheses

-14a+84=0

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

-14a=-84

a=-84/-14

a=+6

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