5=3a+9a

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Solution for 5=3a+9a equation: 



5=3a+9a

We move all terms to the left:

5-(3a+9a)=0

We add all the numbers together, and all the variables

-(+12a)+5=0

We get rid of parentheses

-12a+5=0

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

-12a=-5

a=-5/-12

a=5/12

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