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+4=0

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

-a=-4

a=-4/-1

a=+4

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