57=1+7a

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Solution for 57=1+7a equation: 



57=1+7a

We move all terms to the left:

57-(1+7a)=0

We add all the numbers together, and all the variables

-(7a+1)+57=0

We get rid of parentheses

-7a-1+57=0

We add all the numbers together, and all the variables

-7a+56=0

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

-7a=-56

a=-56/-7

a=+8

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