0=a+7a-3a

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Solution for 0=a+7a-3a equation: 



0=a+7a-3a

We move all terms to the left:

0-(a+7a-3a)=0

We add all the numbers together, and all the variables

-(+5a)+0=0

We add all the numbers together, and all the variables

-(+5a)=0

We get rid of parentheses

-5a=0

a=0/-5

a=0

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