3=a-5+7a

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Solution for 3=a-5+7a equation: 



3=a-5+7a

We move all terms to the left:

3-(a-5+7a)=0

We add all the numbers together, and all the variables

-(8a-5)+3=0

We get rid of parentheses

-8a+5+3=0

We add all the numbers together, and all the variables

-8a+8=0

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

-8a=-8

a=-8/-8

a=1

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