4=a+31

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Solution for 4=a+31 equation: 



4=a+31

We move all terms to the left:

4-(a+31)=0

We get rid of parentheses

-a-31+4=0

We add all the numbers together, and all the variables

-1a-27=0

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

-a=27

a=27/-1

a=-27

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