57=1+8a

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Solution for 57=1+8a equation: 



57=1+8a

We move all terms to the left:

57-(1+8a)=0

We add all the numbers together, and all the variables

-(8a+1)+57=0

We get rid of parentheses

-8a-1+57=0

We add all the numbers together, and all the variables

-8a+56=0

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

-8a=-56

a=-56/-8

a=+7

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