19=3a+4a

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Solution for 19=3a+4a equation: 



19=3a+4a

We move all terms to the left:

19-(3a+4a)=0

We add all the numbers together, and all the variables

-(+7a)+19=0

We get rid of parentheses

-7a+19=0

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

-7a=-19

a=-19/-7

a=2+5/7

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