-23=19+a

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Solution for -23=19+a equation: 



-23=19+a

We move all terms to the left:

-23-(19+a)=0

We add all the numbers together, and all the variables

-(a+19)-23=0

We get rid of parentheses

-a-19-23=0

We add all the numbers together, and all the variables

-1a-42=0

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

-a=42

a=42/-1

a=-42

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