-19=-4+a

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Solution for -19=-4+a equation: 



-19=-4+a

We move all terms to the left:

-19-(-4+a)=0

We add all the numbers together, and all the variables

-(a-4)-19=0

We get rid of parentheses

-a+4-19=0

We add all the numbers together, and all the variables

-1a-15=0

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

-a=15

a=15/-1

a=-15

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