40=18+57a

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Solution for 40=18+57a equation: 



40=18+57a

We move all terms to the left:

40-(18+57a)=0

We add all the numbers together, and all the variables

-(57a+18)+40=0

We get rid of parentheses

-57a-18+40=0

We add all the numbers together, and all the variables

-57a+22=0

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

-57a=-22

a=-22/-57

a=22/57

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